// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "extensions/browser/guest_view/web_view/web_view_guest.h"

#include <stddef.h>

#include <map>
#include <memory>
#include <optional>
#include <string>
#include <utility>

#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/lazy_instance.h"
#include "base/metrics/user_metrics.h"
#include "base/notimplemented.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "build/build_config.h"
#include "components/guest_view/browser/guest_view_event.h"
#include "components/guest_view/browser/guest_view_manager.h"
#include "components/guest_view/common/guest_view_constants.h"
#include "components/input/native_web_keyboard_event.h"
#include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
#include "components/permissions/permission_util.h"
#include "components/web_cache/browser/web_cache_manager.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_security_policy.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/navigation_throttle.h"
#include "content/public/browser/navigation_throttle_registry.h"
#include "content/public/browser/permission_result.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/site_isolation_policy.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/storage_partition_config.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/result_codes.h"
#include "content/public/common/stop_find_action.h"
#include "content/public/common/url_constants.h"
#include "extensions/browser/api/declarative/rules_registry_service.h"
#include "extensions/browser/api/extensions_api_client.h"
#include "extensions/browser/api/web_request/extension_web_request_event_router.h"
#include "extensions/browser/bad_message.h"
#include "extensions/browser/extension_system.h"
#include "extensions/browser/extension_util.h"
#include "extensions/browser/extension_web_contents_observer.h"
#include "extensions/browser/extensions_browser_client.h"
#include "extensions/browser/guest_view/web_view/web_view_constants.h"
#include "extensions/browser/guest_view/web_view/web_view_content_script_manager.h"
#include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
#include "extensions/browser/guest_view/web_view/web_view_permission_types.h"
#include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
#include "extensions/browser/process_manager.h"
#include "extensions/browser/rules_registry_ids.h"
#include "extensions/browser/url_loader_factory_manager.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension_features.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/strings/grit/extensions_strings.h"
#include "ipc/ipc_message_macros.h"
#include "net/base/net_errors.h"
#include "net/cookies/canonical_cookie.h"
#include "services/network/public/mojom/clear_data_filter.mojom.h"
#include "third_party/blink/public/common/logging/logging_utils.h"
#include "third_party/blink/public/common/mediastream/media_stream_request.h"
#include "third_party/blink/public/common/page/page_zoom.h"
#include "third_party/blink/public/common/permissions/permission_utils.h"
#include "third_party/blink/public/common/renderer_preferences/renderer_preferences.h"
#include "third_party/blink/public/common/user_agent/user_agent_metadata.h"
#include "third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom.h"
#include "third_party/blink/public/mojom/window_features/window_features.mojom.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/menus/simple_menu_model.h"
#include "url/url_constants.h"

using base::UserMetricsAction;
using content::GlobalRequestID;
using content::RenderFrameHost;
using content::RenderProcessHost;
using content::StoragePartition;
using content::WebContents;
using guest_view::GuestViewBase;
using guest_view::GuestViewEvent;
using guest_view::GuestViewManager;
using zoom::ZoomController;

namespace extensions {

namespace {

// Attributes.
constexpr char kAttributeAllowTransparency[] = "allowtransparency";
constexpr char kAttributeAllowScaling[] = "allowscaling";
constexpr char kAttributeName[] = "name";
constexpr char kAttributeSrc[] = "src";

// API namespace.
constexpr char kAPINamespace[] = "webViewInternal";

// Initialization parameters.
constexpr char kInitialZoomFactor[] = "initialZoomFactor";
constexpr char kParameterUserAgentOverride[] = "userAgentOverride";

// Internal parameters/properties on events.
constexpr char kInternalBaseURLForDataURL[] = "baseUrlForDataUrl";
constexpr char kInternalCurrentEntryIndex[] = "currentEntryIndex";
constexpr char kInternalEntryCount[] = "entryCount";
constexpr char kInternalProcessId[] = "processId";
constexpr char kInternalVisibleUrl[] = "visibleUrl";

constexpr char kMainFrameName[] = "mainFrameName";
constexpr char kOpenerProcessId[] = "openerProcessId";
constexpr char kOpenerFrameToken[] = "openerFrameToken";

// Returns storage partition removal mask from web_view clearData mask. Note
// that storage partition mask is a subset of webview's data removal mask.
uint32_t GetStoragePartitionRemovalMask(uint32_t web_view_removal_mask) {
  uint32_t mask = 0;
  if (web_view_removal_mask &
      (webview::WEB_VIEW_REMOVE_DATA_MASK_COOKIES |
       webview::WEB_VIEW_REMOVE_DATA_MASK_SESSION_COOKIES |
       webview::WEB_VIEW_REMOVE_DATA_MASK_PERSISTENT_COOKIES)) {
    mask |= StoragePartition::REMOVE_DATA_MASK_COOKIES;
  }
  if (web_view_removal_mask & webview::WEB_VIEW_REMOVE_DATA_MASK_FILE_SYSTEMS) {
    mask |= StoragePartition::REMOVE_DATA_MASK_FILE_SYSTEMS;
  }
  if (web_view_removal_mask & webview::WEB_VIEW_REMOVE_DATA_MASK_INDEXEDDB) {
    mask |= StoragePartition::REMOVE_DATA_MASK_INDEXEDDB;
  }
  if (web_view_removal_mask &
      webview::WEB_VIEW_REMOVE_DATA_MASK_LOCAL_STORAGE) {
    mask |= StoragePartition::REMOVE_DATA_MASK_LOCAL_STORAGE;
  }

  return mask;
}

std::string WindowOpenDispositionToString(
    WindowOpenDisposition window_open_disposition) {
  switch (window_open_disposition) {
    case WindowOpenDisposition::IGNORE_ACTION:
      return "ignore";
    case WindowOpenDisposition::SAVE_TO_DISK:
      return "save_to_disk";
    case WindowOpenDisposition::CURRENT_TAB:
      return "current_tab";
    case WindowOpenDisposition::NEW_BACKGROUND_TAB:
      return "new_background_tab";
    case WindowOpenDisposition::NEW_FOREGROUND_TAB:
      return "new_foreground_tab";
    case WindowOpenDisposition::NEW_WINDOW:
      return "new_window";
    case WindowOpenDisposition::NEW_POPUP:
      return "new_popup";
    default:
      NOTREACHED() << "Unknown Window Open Disposition";
  }
}

static std::string TerminationStatusToString(base::TerminationStatus status) {
  switch (status) {
    case base::TERMINATION_STATUS_NORMAL_TERMINATION:
      return "normal";
    case base::TERMINATION_STATUS_ABNORMAL_TERMINATION:
    case base::TERMINATION_STATUS_STILL_RUNNING:
      return "abnormal";
#if BUILDFLAG(IS_CHROMEOS)
    case base::TERMINATION_STATUS_PROCESS_WAS_KILLED_BY_OOM:
      return "oom killed";
#endif
    case base::TERMINATION_STATUS_OOM:
      return "oom";
    case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
      return "killed";
    case base::TERMINATION_STATUS_PROCESS_CRASHED:
      return "crashed";
    case base::TERMINATION_STATUS_LAUNCH_FAILED:
      return "failed to launch";
#if BUILDFLAG(IS_WIN)
    case base::TERMINATION_STATUS_INTEGRITY_FAILURE:
      return "integrity failure";
#endif
    case base::TERMINATION_STATUS_MAX_ENUM:
      break;
  }
  NOTREACHED() << "Unknown Termination Status.";
}

std::string GetStoragePartitionIdFromPartitionConfig(
    const content::StoragePartitionConfig& storage_partition_config) {
  const auto& partition_id = storage_partition_config.partition_name();
  bool persist_storage = !storage_partition_config.in_memory();
  return (persist_storage ? webview::kPersistPrefix : "") + partition_id;
}

void ParsePartitionParam(const base::Value::Dict& create_params,
                         std::string* storage_partition_id,
                         bool* persist_storage) {
  const std::string* partition_str =
      create_params.FindString(webview::kStoragePartitionId);
  if (!partition_str) {
    return;
  }

  // Since the "persist:" prefix is in ASCII, base::StartsWith will work fine on
  // UTF-8 encoded |partition_id|. If the prefix is a match, we can safely
  // remove the prefix without splicing in the middle of a multi-byte codepoint.
  // We can use the rest of the string as UTF-8 encoded one.
  if (base::StartsWith(*partition_str,
                       "persist:", base::CompareCase::SENSITIVE)) {
    size_t index = partition_str->find(":");
    CHECK(index != std::string::npos);
    // It is safe to do index + 1, since we tested for the full prefix above.
    *storage_partition_id = partition_str->substr(index + 1);

    if (storage_partition_id->empty()) {
      // TODO(lazyboy): Better way to deal with this error.
      return;
    }
    *persist_storage = true;
  } else {
    *storage_partition_id = *partition_str;
    *persist_storage = false;
  }
}

double ConvertZoomLevelToZoomFactor(double zoom_level) {
  double zoom_factor = blink::ZoomLevelToZoomFactor(zoom_level);
  // Because the conversion from zoom level to zoom factor isn't perfect, the
  // resulting zoom factor is rounded to the nearest 6th decimal place.
  zoom_factor = round(zoom_factor * 1000000) / 1000000;
  return zoom_factor;
}

using WebViewKey = std::pair<content::ChildProcessId, int>;
using WebViewKeyToIDMap = std::map<WebViewKey, int>;
static base::LazyInstance<WebViewKeyToIDMap>::DestructorAtExit
    web_view_key_to_id_map = LAZY_INSTANCE_INITIALIZER;

}  // namespace

WebViewGuest::NewWindowInfo::NewWindowInfo(const GURL& url,
                                           const std::string& name)
    : name(name), url(url) {}

WebViewGuest::NewWindowInfo::NewWindowInfo(const WebViewGuest::NewWindowInfo&) =
    default;

WebViewGuest::NewWindowInfo::~NewWindowInfo() = default;

class WebViewGuest::CreateWindowThrottle : public content::NavigationThrottle {
 public:
  CreateWindowThrottle(content::NavigationThrottleRegistry& registry,
                       WebViewGuest* web_view_guest)
      : content::NavigationThrottle(registry),
        web_view_guest_(web_view_guest->GetWeakPtr()) {
    web_view_guest->create_window_throttle_ = weak_ptr_factory_.GetWeakPtr();
  }

  CreateWindowThrottle(const CreateWindowThrottle&) = delete;
  CreateWindowThrottle& operator=(const CreateWindowThrottle&) = delete;

  ~CreateWindowThrottle() override = default;

  // content::NavigationThrottle implementation:
  NavigationThrottle::ThrottleCheckResult WillStartRequest() override {
    if (web_view_guest_ && !web_view_guest_->attached()) {
      deferred_ = true;
      return DEFER;
    }
    return PROCEED;
  }

  void ResumeThrottle() {
    if (!deferred_) {
      return;
    }
    deferred_ = false;
    Resume();
  }

  const char* GetNameForLogging() override { return "WebViewGuestThrottle"; }

 private:
  bool deferred_ = false;
  base::WeakPtr<WebViewGuest> web_view_guest_;
  base::WeakPtrFactory<WebViewGuest::CreateWindowThrottle> weak_ptr_factory_{
      this};
};

// static
void WebViewGuest::MaybeCreateAndAddNavigationThrottle(
    content::NavigationThrottleRegistry& registry) {
  if (!base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    return;
  }

  auto* web_view_guest =
      WebViewGuest::FromNavigationHandle(&registry.GetNavigationHandle());
  if (!web_view_guest) {
    return;
  }
  if (web_view_guest->attached()) {
    return;
  }

  WebViewGuest* opener = web_view_guest->GetOpener();
  if (!opener) {
    return;
  }
  // We need to do a navigation here if the target URL has changed between
  // the time the WebContents was created and the time it was attached.
  // We also need to do an initial navigation if a RenderView was never
  // created for the new window in cases where there is no referrer.
  if (!opener->pending_new_windows_.contains(web_view_guest)) {
    return;
  }

  registry.AddThrottle(
      std::make_unique<CreateWindowThrottle>(registry, web_view_guest));
}

// static
void WebViewGuest::CleanUp(content::BrowserContext* browser_context,
                           content::ChildProcessId embedder_process_id,
                           int view_instance_id) {
  // Clean up rules registries for the WebView.
  WebViewKey key(embedder_process_id, view_instance_id);
  auto it = web_view_key_to_id_map.Get().find(key);
  if (it != web_view_key_to_id_map.Get().end()) {
    auto rules_registry_id = it->second;
    web_view_key_to_id_map.Get().erase(it);
    RulesRegistryService* rrs =
        RulesRegistryService::GetIfExists(browser_context);
    if (rrs) {
      rrs->RemoveRulesRegistriesByID(rules_registry_id);
    }
  }

  // Clean up web request event listeners for the WebView.
  WebRequestEventRouter::Get(browser_context)
      // TODO(crbug.com/379869738): remove GetUnsafeValue
      ->RemoveWebViewEventListeners(browser_context,
                                    embedder_process_id.GetUnsafeValue(),
                                    view_instance_id);

  // Clean up content scripts for the WebView.
  auto* csm = WebViewContentScriptManager::Get(browser_context);
  // TODO(crbug.com/379869738): remove GetUnsafeValue
  csm->RemoveAllContentScriptsForWebView(embedder_process_id.GetUnsafeValue(),
                                         view_instance_id);

  // Allow an extensions browser client to potentially perform more cleanup.
  ExtensionsBrowserClient::Get()->CleanUpWebView(
      // TODO(crbug.com/379869738): remove GetUnsafeValue
      browser_context, embedder_process_id.GetUnsafeValue(), view_instance_id);
}

// static
std::unique_ptr<GuestViewBase> WebViewGuest::Create(
    content::RenderFrameHost* owner_rfh) {
  return base::WrapUnique(new WebViewGuest(owner_rfh));
}

// static
std::string WebViewGuest::GetPartitionID(
    RenderProcessHost* render_process_host) {
  WebViewRendererState* renderer_state = WebViewRendererState::GetInstance();
  int process_id = render_process_host->GetDeprecatedID();
  std::string partition_id;
  if (renderer_state->IsGuest(process_id)) {
    renderer_state->GetPartitionID(process_id, &partition_id);
  }

  return partition_id;
}

// static
const char WebViewGuest::Type[] = "webview";
const guest_view::GuestViewHistogramValue WebViewGuest::HistogramValue =
    guest_view::GuestViewHistogramValue::kWebView;

// static
int WebViewGuest::GetOrGenerateRulesRegistryID(int embedder_process_id,
                                               int webview_instance_id) {
  bool is_web_view = embedder_process_id && webview_instance_id;
  if (!is_web_view) {
    return rules_registry_ids::kDefaultRulesRegistryID;
  }

  WebViewKey key = std::make_pair(content::ChildProcessId(embedder_process_id),
                                  webview_instance_id);
  auto it = web_view_key_to_id_map.Get().find(key);
  if (it != web_view_key_to_id_map.Get().end()) {
    return it->second;
  }

  auto* rph = RenderProcessHost::FromID(embedder_process_id);
  int rules_registry_id = RulesRegistryService::Get(rph->GetBrowserContext())
                              ->GetNextRulesRegistryID();
  web_view_key_to_id_map.Get()[key] = rules_registry_id;
  return rules_registry_id;
}

void WebViewGuest::CreateInnerPage(
    std::unique_ptr<GuestViewBase> owned_this,
    scoped_refptr<content::SiteInstance> site_instance,
    const base::Value::Dict& create_params,
    GuestPageCreatedCallback callback) {
  RenderFrameHost* owner_render_frame_host = owner_rfh();
  RenderProcessHost* owner_render_process_host =
      owner_render_frame_host->GetProcess();
  DCHECK_EQ(browser_context(), owner_render_process_host->GetBrowserContext());

  std::string storage_partition_id;
  bool persist_storage = false;
  ParsePartitionParam(create_params, &storage_partition_id, &persist_storage);

  if (auto* name = create_params.FindString(kMainFrameName)) {
    name_ = *name;
  }
  // Validate that the partition id coming from the renderer is valid UTF-8,
  // since we depend on this in other parts of the code, such as FilePath
  // creation. If the validation fails, treat it as a bad message and kill the
  // renderer process.
  if (!base::IsStringUTF8(storage_partition_id)) {
    bad_message::ReceivedBadMessage(owner_render_process_host,
                                    bad_message::WVG_PARTITION_ID_NOT_UTF8);
    RejectGuestCreation(std::move(owned_this), std::move(callback));
    return;
  }

  if (site_instance) {
    CreateInnerPageWithSiteInstance(std::move(owned_this), site_instance,
                                    create_params, std::move(callback));
  } else {
    ExtensionsBrowserClient::Get()->GetWebViewStoragePartitionConfig(
        browser_context(), owner_render_frame_host->GetSiteInstance(),
        storage_partition_id, /*in_memory=*/!persist_storage,
        base::BindOnce(&WebViewGuest::CreateInnerPageWithStoragePartition,
                       weak_ptr_factory_.GetWeakPtr(), std::move(owned_this),
                       create_params.Clone(), std::move(callback)));
  }
}

void WebViewGuest::CreateInnerPageWithStoragePartition(
    std::unique_ptr<GuestViewBase> owned_this,
    const base::Value::Dict& create_params,
    GuestPageCreatedCallback callback,
    std::optional<content::StoragePartitionConfig> partition_config) {
  if (!partition_config.has_value()) {
    RejectGuestCreation(std::move(owned_this), std::move(callback));
    return;
  }

  // If we already have a webview tag in the same app using the same storage
  // partition, we should use the same SiteInstance so the existing tag and
  // the new tag can script each other.
  auto* guest_view_manager =
      GuestViewManager::FromBrowserContext(browser_context());
  scoped_refptr<content::SiteInstance> guest_site_instance =
      guest_view_manager->GetGuestSiteInstance(*partition_config);
  if (!guest_site_instance) {
    // Create the SiteInstance in a new BrowsingInstance, which will ensure
    // that webview tags are also not allowed to send messages across
    // different partitions.
    guest_site_instance = content::SiteInstance::CreateForGuest(
        browser_context(), *partition_config);
  }
  CreateInnerPageWithSiteInstance(std::move(owned_this), guest_site_instance,
                                  create_params, std::move(callback));
}

void WebViewGuest::CreateInnerPageWithSiteInstance(
    std::unique_ptr<GuestViewBase> owned_this,
    scoped_refptr<content::SiteInstance> guest_site_instance,
    const base::Value::Dict& create_params,
    GuestPageCreatedCallback callback) {
  auto grant_commit_origin = [&](content::RenderFrameHost* guest_main_frame) {
    // Grant access to the origin of the embedder to the guest process. This
    // allows blob: and filesystem: URLs with the embedder origin to be created
    // inside the guest. It is possible to do this by running embedder code
    // through webview accessible_resources.
    //
    // TODO(dcheng): Is granting commit origin really the right thing to do
    // here?
    content::ChildProcessSecurityPolicy::GetInstance()->GrantCommitOrigin(
        guest_main_frame->GetProcess()->GetDeprecatedID(),
        url::Origin::Create(GetOwnerSiteURL()));
  };

  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    content::GlobalRenderFrameHostToken opener_token;
    if (auto process_id = create_params.FindInt(kOpenerProcessId)) {
      opener_token.child_id = *process_id;
    }

    if (auto* frame_token = create_params.FindString(kOpenerFrameToken)) {
      auto token = base::UnguessableToken::DeserializeFromString(*frame_token);
      opener_token.frame_token = blink::LocalFrameToken(*token);
    }

    RenderFrameHost* opener = RenderFrameHost::FromFrameToken(opener_token);

    std::unique_ptr<content::GuestPageHolder> guest_page =
        content::GuestPageHolder::CreateWithOpener(
            owner_web_contents(), name_, opener, guest_site_instance,
            GetGuestPageHolderDelegateWeakPtr());
    WebContents::CreateParams stored_params(browser_context(),
                                            std::move(guest_site_instance));
    stored_params.guest_delegate = this;
    SetCreateParams(create_params, stored_params);

    grant_commit_origin(guest_page->GetGuestMainFrame());

    std::move(callback).Run(std::move(owned_this), std::move(guest_page));
  } else {
    WebContents::CreateParams params(browser_context(),
                                     std::move(guest_site_instance));
    params.guest_delegate = this;
    SetCreateParams(create_params, params);
    std::unique_ptr<WebContents> new_contents = WebContents::Create(params);

    grant_commit_origin(new_contents->GetPrimaryMainFrame());

    std::move(callback).Run(std::move(owned_this), std::move(new_contents));
  }
}

void WebViewGuest::DidAttachToEmbedder() {
  if (pending_first_navigation_) {
    CHECK(base::FeatureList::IsEnabled(features::kGuestViewMPArch));
    std::move(pending_first_navigation_).Run();
  }

  ApplyAttributes(attach_params());
  if (create_window_throttle_) {
    std::move(create_window_throttle_)->ResumeThrottle();
  }
}

void WebViewGuest::DidInitialize(const base::Value::Dict& create_params) {
  script_executor_ = std::make_unique<ScriptExecutor>(web_contents());

  if (!base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    ExtensionsAPIClient::Get()->AttachWebContentsHelpers(web_contents());
  }
  web_view_permission_helper_ = std::make_unique<WebViewPermissionHelper>(this);

  rules_registry_id_ = GetOrGenerateRulesRegistryID(
      owner_rfh()->GetProcess()->GetDeprecatedID(), view_instance_id());

  // We must install the mapping from guests to WebViews prior to resuming
  // suspended resource loads so that the WebRequest API will catch resource
  // requests.
  PushWebViewStateToIOThread(GetGuestMainFrame());

  ApplyAttributes(create_params);
}

void WebViewGuest::MaybeRecreateGuestContents(
    content::RenderFrameHost* outer_contents_frame) {
  DCHECK(GetCreateParams().has_value());
  auto& [create_params, web_contents_create_params] = *GetCreateParams();
  DCHECK_EQ(web_contents_create_params.guest_delegate, this);

  if (!web_contents_create_params.opener_suppressed) {
    owner_web_contents()->GetPrimaryMainFrame()->AddMessageToConsole(
        blink::mojom::ConsoleMessageLevel::kWarning,
        "A <webview> is being attached to a window other than the window of "
        "its opener <webview>. The window reference the opener <webview> "
        "obtained from window.open will be invalidated.");
  }

  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    content::RenderFrameHost* opener = GetGuestPageHolder().GetOpener();
    ClearOwnedGuestPage();
    UpdateWebContentsForNewOwner(outer_contents_frame->GetParent());

    std::unique_ptr<content::GuestPageHolder> guest_page_holder =
        content::GuestPageHolder::CreateWithOpener(
            content::WebContents::FromRenderFrameHost(outer_contents_frame),
            name_, opener, web_contents_create_params.site_instance,
            GetGuestPageHolderDelegateWeakPtr());
    InitWithGuestPageHolder(create_params, guest_page_holder.get());
    TakeGuestPageOwnership(std::move(guest_page_holder));
  } else {
    ClearOwnedGuestContents();
    UpdateWebContentsForNewOwner(outer_contents_frame->GetParent());

    auto new_web_contents_create_params = web_contents_create_params;
    new_web_contents_create_params.renderer_initiated_creation = false;
    std::unique_ptr<WebContents> new_contents =
        WebContents::Create(new_web_contents_create_params);
    InitWithWebContents(create_params, new_contents.get());
    TakeGuestContentsOwnership(std::move(new_contents));
  }

  // The original guest main frame had a pending navigation which was discarded.
  // We'll need to trigger the intended navigation in the new guest contents,
  // but we need to wait until later in the attachment process, after the state
  // related to the WebRequest API is set up.
  recreate_initial_nav_ = base::BindOnce(
      &WebViewGuest::LoadURLWithParams, weak_ptr_factory_.GetWeakPtr(),
      web_contents_create_params.initial_popup_url, content::Referrer(),
      ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
      base::OnceCallback<void(content::NavigationHandle&)>(),
      /*force_navigation=*/true);
}

void WebViewGuest::ClearCodeCache(base::Time remove_since,
                                  uint32_t removal_mask,
                                  base::OnceClosure callback) {
  auto* guest_main_frame = GetGuestMainFrame();
  DCHECK(guest_main_frame);
  content::StoragePartition* partition =
      guest_main_frame->GetStoragePartition();
  DCHECK(partition);
  base::OnceClosure code_cache_removal_done_callback = base::BindOnce(
      &WebViewGuest::ClearDataInternal, weak_ptr_factory_.GetWeakPtr(),
      remove_since, removal_mask, std::move(callback));
  partition->ClearCodeCaches(remove_since, base::Time::Now(),
                             base::RepeatingCallback<bool(const GURL&)>(),
                             std::move(code_cache_removal_done_callback));
}

void WebViewGuest::ClearDataInternal(base::Time remove_since,
                                     uint32_t removal_mask,
                                     base::OnceClosure callback) {
  uint32_t storage_partition_removal_mask =
      GetStoragePartitionRemovalMask(removal_mask);
  if (!storage_partition_removal_mask) {
    std::move(callback).Run();
    return;
  }

  auto cookie_delete_filter = network::mojom::CookieDeletionFilter::New();
  // Intentionally do not set the deletion filter time interval because the
  // time interval parameters to ClearData() will be used.

  // TODO(cmumford): Make this (and webview::* constants) constexpr.
  const uint32_t ALL_COOKIES_MASK =
      webview::WEB_VIEW_REMOVE_DATA_MASK_SESSION_COOKIES |
      webview::WEB_VIEW_REMOVE_DATA_MASK_PERSISTENT_COOKIES;

  if ((removal_mask & ALL_COOKIES_MASK) == ALL_COOKIES_MASK) {
    cookie_delete_filter->session_control =
        network::mojom::CookieDeletionSessionControl::IGNORE_CONTROL;
  } else if (removal_mask &
             webview::WEB_VIEW_REMOVE_DATA_MASK_SESSION_COOKIES) {
    cookie_delete_filter->session_control =
        network::mojom::CookieDeletionSessionControl::SESSION_COOKIES;
  } else if (removal_mask &
             webview::WEB_VIEW_REMOVE_DATA_MASK_PERSISTENT_COOKIES) {
    cookie_delete_filter->session_control =
        network::mojom::CookieDeletionSessionControl::PERSISTENT_COOKIES;
  }

  bool perform_cleanup = remove_since.is_null();

  auto* guest_main_frame = GetGuestMainFrame();
  DCHECK(guest_main_frame);
  content::StoragePartition* partition =
      guest_main_frame->GetStoragePartition();
  DCHECK(partition);
  partition->ClearData(
      storage_partition_removal_mask,
      content::StoragePartition::QUOTA_MANAGED_STORAGE_MASK_ALL,
      /*filter_builder=*/nullptr,
      content::StoragePartition::StorageKeyPolicyMatcherFunction(),
      std::move(cookie_delete_filter), perform_cleanup, remove_since,
      base::Time::Max(), std::move(callback));
}

void WebViewGuest::GuestViewDidStopLoading() {
  base::Value::Dict args;
  DispatchEventToView(std::make_unique<GuestViewEvent>(webview::kEventLoadStop,
                                                       std::move(args)));
}

void WebViewGuest::EmbedderFullscreenToggled(bool entered_fullscreen) {
  is_embedder_fullscreen_ = entered_fullscreen;
  // If the embedder has got out of fullscreen, we get out of fullscreen
  // mode as well.
  if (!entered_fullscreen) {
    SetFullscreenState(false);
  }
}

bool WebViewGuest::ZoomPropagatesFromEmbedderToGuest() const {
  // We use the embedder's zoom iff we haven't set a zoom ourselves using
  // e.g. webview.setZoom().
  return !did_set_explicit_zoom_;
}

const char* WebViewGuest::GetAPINamespace() const {
  return kAPINamespace;
}

int WebViewGuest::GetTaskPrefix() const {
  return IDS_EXTENSION_TASK_MANAGER_WEBVIEW_TAG_PREFIX;
}

void WebViewGuest::WebContentsDestroyed() {
  // Note that this is not always redundant with guest removal in
  // RenderFrameDeleted(), such as when destroying unattached guests that never
  // had a RenderFrame created.
  // TODO(crbug.com/40202416): Implement an MPArch equivalent of this.
  if (GetGuestMainFrame()) {
    WebViewRendererState::GetInstance()->RemoveGuest(
        GetGuestMainFrame()->GetProcess()->GetDeprecatedID(),
        GetGuestMainFrame()->GetRoutingID());
  }
  // The following call may destroy `this`.
  GuestViewBase::WebContentsDestroyed();
}

void WebViewGuest::GuestSizeChangedDueToAutoSize(const gfx::Size& old_size,
                                                 const gfx::Size& new_size) {
  base::Value::Dict args;
  args.Set(webview::kOldHeight, old_size.height());
  args.Set(webview::kOldWidth, old_size.width());
  args.Set(webview::kNewHeight, new_size.height());
  args.Set(webview::kNewWidth, new_size.width());
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventSizeChanged, std::move(args)));
}

bool WebViewGuest::IsAutoSizeSupported() const {
  return true;
}

void WebViewGuest::GuestZoomChanged(double old_zoom_level,
                                    double new_zoom_level) {
  // Dispatch the zoomchange event.
  double old_zoom_factor = ConvertZoomLevelToZoomFactor(old_zoom_level);
  double new_zoom_factor = ConvertZoomLevelToZoomFactor(new_zoom_level);
  base::Value::Dict args;
  args.Set(webview::kOldZoomFactor, old_zoom_factor);
  args.Set(webview::kNewZoomFactor, new_zoom_factor);
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventZoomChange, std::move(args)));
}

void WebViewGuest::CloseContents(WebContents* source) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));
  GuestClose();
}

void WebViewGuest::FindReply(WebContents* source,
                             int request_id,
                             int number_of_matches,
                             const gfx::Rect& selection_rect,
                             int active_match_ordinal,
                             bool final_update) {
  GuestViewBase::FindReply(source, request_id, number_of_matches,
                           selection_rect, active_match_ordinal, final_update);
  find_helper_.FindReply(request_id, number_of_matches, selection_rect,
                         active_match_ordinal, final_update);
}

double WebViewGuest::GetZoom() const {
  double zoom_level = GetZoomController()->GetZoomLevel();
  return ConvertZoomLevelToZoomFactor(zoom_level);
}

ZoomController::ZoomMode WebViewGuest::GetZoomMode() {
  return GetZoomController()->zoom_mode();
}

bool WebViewGuest::GuestHandleContextMenu(
    content::RenderFrameHost& render_frame_host,
    const content::ContextMenuParams& params) {
  CHECK(base::FeatureList::IsEnabled(features::kGuestViewMPArch));
  return web_view_guest_delegate_ &&
         web_view_guest_delegate_->HandleContextMenu(render_frame_host, params);
}

bool WebViewGuest::HandleContextMenu(
    content::RenderFrameHost& render_frame_host,
    const content::ContextMenuParams& params) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  return web_view_guest_delegate_ &&
         web_view_guest_delegate_->HandleContextMenu(render_frame_host, params);
}

bool WebViewGuest::HandleKeyboardEvent(
    WebContents* source,
    const input::NativeWebKeyboardEvent& event) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  if (HandleKeyboardShortcuts(event)) {
    return true;
  }

  return GuestViewBase::HandleKeyboardEvent(source, event);
}

bool WebViewGuest::PreHandleGestureEvent(WebContents* source,
                                         const blink::WebGestureEvent& event) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  return !allow_scaling_ && GuestViewBase::PreHandleGestureEvent(source, event);
}

void WebViewGuest::LoadAbort(bool is_top_level,
                             const GURL& url,
                             int error_code) {
  base::Value::Dict args;
  args.Set(guest_view::kIsTopLevel, is_top_level);
  args.Set(guest_view::kUrl, url.possibly_invalid_spec());
  args.Set(guest_view::kCode, error_code);
  args.Set(guest_view::kReason, net::ErrorToShortString(error_code));
  DispatchEventToView(std::make_unique<GuestViewEvent>(webview::kEventLoadAbort,
                                                       std::move(args)));
}

content::GuestPageHolder* WebViewGuest::GuestCreateNewWindow(
    WindowOpenDisposition disposition,
    const GURL& url,
    const std::string& main_frame_name,
    content::RenderFrameHost* opener,
    scoped_refptr<content::SiteInstance> site_instance) {
  GuestViewManager* guest_manager =
      GuestViewManager::FromBrowserContext(browser_context());
  // Set the attach params to use the same partition as the opener.
  const auto storage_partition_config =
      site_instance->GetStoragePartitionConfig();
  const std::string storage_partition_id =
      GetStoragePartitionIdFromPartitionConfig(storage_partition_config);
  base::Value::Dict create_params;
  create_params.Set(webview::kStoragePartitionId, storage_partition_id);
  create_params.Set(kMainFrameName, main_frame_name);
  if (opener) {
    create_params.Set(kOpenerProcessId,
                      opener->GetProcess()->GetID().GetUnsafeValue());
    create_params.Set(kOpenerFrameToken, opener->GetFrameToken().ToString());
  }

  int guest_instance_id = guest_manager->CreateGuestAndTransferOwnership(
      WebViewGuest::Type, owner_rfh(), site_instance, create_params,
      base::BindOnce(&WebViewGuest::NewGuestWebViewCallback,
                     weak_ptr_factory_.GetWeakPtr(), disposition, url,
                     main_frame_name));
  WebViewGuest* guest =
      static_cast<WebViewGuest*>(guest_manager->GetGuestByInstanceIDSafely(
          guest_instance_id,
          owner_rfh()->GetProcess()->GetID().GetUnsafeValue()));
  if (!guest) {
    return nullptr;
  }
  auto& [stored_create_params, web_contents_create_params] =
      *guest->GetCreateParams();
  auto new_web_contents_create_params = web_contents_create_params;
  new_web_contents_create_params.initial_popup_url = url;
  guest->SetCreateParams(stored_create_params, new_web_contents_create_params);
  return &guest->GetGuestPageHolder();
}

void WebViewGuest::GuestOpenURL(
    const content::OpenURLParams& params,
    base::OnceCallback<void(content::NavigationHandle&)>
        navigation_handle_callback) {
  OpenURLFromTab(owner_web_contents(), params,
                 std::move(navigation_handle_callback));
}

void WebViewGuest::GuestClose() {
  base::Value::Dict args;
  DispatchEventToView(
      std::make_unique<GuestViewEvent>(webview::kEventClose, std::move(args)));
}

void WebViewGuest::GuestRequestMediaAccessPermission(
    const content::MediaStreamRequest& request,
    content::MediaResponseCallback callback) {
  if (IsOwnedByControlledFrameEmbedder()) {
    web_view_permission_helper_->RequestMediaAccessPermissionForControlledFrame(
        web_contents(), request, std::move(callback));
    return;
  }
  web_view_permission_helper_->RequestMediaAccessPermission(
      request, std::move(callback));
}

bool WebViewGuest::GuestCheckMediaAccessPermission(
    content::RenderFrameHost* render_frame_host,
    const url::Origin& security_origin,
    blink::mojom::MediaStreamType type) {
  if (IsOwnedByControlledFrameEmbedder()) {
    return web_view_permission_helper_
        ->CheckMediaAccessPermissionForControlledFrame(render_frame_host,
                                                       security_origin, type);
  }
  return web_view_permission_helper_->CheckMediaAccessPermission(
      render_frame_host, security_origin, type);
}

void WebViewGuest::CreateNewGuestWebViewWindow(
    const content::OpenURLParams& params) {
  GuestViewManager* guest_manager =
      GuestViewManager::FromBrowserContext(browser_context());
  // Set the attach params to use the same partition as the opener.
  const auto storage_partition_config =
      web_contents()->GetSiteInstance()->GetStoragePartitionConfig();
  const std::string storage_partition_id =
      GetStoragePartitionIdFromPartitionConfig(storage_partition_config);
  base::Value::Dict create_params;
  create_params.Set(webview::kStoragePartitionId, storage_partition_id);

  content::RenderFrameHost* source = content::RenderFrameHost::FromID(
      params.source_render_process_id, params.source_render_frame_id);
  if (source && params.has_rel_opener) {
    create_params.Set(kOpenerProcessId,
                      source->GetProcess()->GetID().GetUnsafeValue());
    create_params.Set(kOpenerFrameToken, source->GetFrameToken().ToString());
  }
  int guest_instance_id = guest_manager->CreateGuestAndTransferOwnership(
      WebViewGuest::Type, embedder_rfh(), nullptr, create_params,
      base::BindOnce(&WebViewGuest::NewGuestWebViewCallback,
                     weak_ptr_factory_.GetWeakPtr(), params.disposition,
                     params.url, std::string()));
  WebViewGuest* guest =
      static_cast<WebViewGuest*>(guest_manager->GetGuestByInstanceIDSafely(
          guest_instance_id,
          owner_rfh()->GetProcess()->GetID().GetUnsafeValue()));
  if (!guest) {
    return;
  }
  auto& [stored_create_params, web_contents_create_params] =
      *guest->GetCreateParams();
  auto new_web_contents_create_params = web_contents_create_params;
  new_web_contents_create_params.initial_popup_url = params.url;
  guest->SetCreateParams(stored_create_params, new_web_contents_create_params);
}

void WebViewGuest::NewGuestWebViewCallback(
    WindowOpenDisposition disposition,
    const GURL& url,
    const std::string& frame_name,
    std::unique_ptr<GuestViewBase> guest) {
  auto* raw_new_guest = static_cast<WebViewGuest*>(guest.release());
  std::unique_ptr<WebViewGuest> new_guest = base::WrapUnique(raw_new_guest);

  raw_new_guest->SetOpener(this);

  pending_new_windows_.insert(
      std::make_pair(raw_new_guest, NewWindowInfo(url, frame_name)));

  // Request permission to show the new window.
  RequestNewWindowPermission(disposition, gfx::Rect(), std::move(new_guest));
}

// TODO(fsamuel): Find a reliable way to test the 'responsive' and
// 'unresponsive' events.
void WebViewGuest::RendererResponsive(
    WebContents* source,
    content::RenderWidgetHost* render_widget_host) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  base::Value::Dict args;
  args.Set(webview::kProcessId,
           render_widget_host->GetProcess()->GetDeprecatedID());
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventResponsive, std::move(args)));
}

void WebViewGuest::RendererUnresponsive(
    WebContents* source,
    content::RenderWidgetHost* render_widget_host,
    base::RepeatingClosure hang_monitor_restarter) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  base::Value::Dict args;
  args.Set(webview::kProcessId,
           render_widget_host->GetProcess()->GetDeprecatedID());
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventUnresponsive, std::move(args)));
}

void WebViewGuest::StartFind(
    const std::u16string& search_text,
    blink::mojom::FindOptionsPtr options,
    WebViewFindHelper::ForwardResponseCallback callback) {
  find_helper_.Find(web_contents(), search_text, std::move(options),
                    std::move(callback));
}

void WebViewGuest::StopFinding(content::StopFindAction action) {
  find_helper_.CancelAllFindSessions();
  web_contents()->StopFinding(action);
}

bool WebViewGuest::Go(int relative_index) {
  content::NavigationController& controller = GetController();
  if (!controller.CanGoToOffset(relative_index)) {
    return false;
  }

  controller.GoToOffset(relative_index);
  return true;
}

void WebViewGuest::Reload() {
  // TODO(fsamuel): Don't check for repost because we don't want to show
  // Chromium's repost warning. We might want to implement a separate API
  // for registering a callback if a repost is about to happen.
  GetController().Reload(content::ReloadType::NORMAL, false);
}

void WebViewGuest::GuestOverrideRendererPreferences(
    blink::RendererPreferences& preferences) {
  CHECK(base::FeatureList::IsEnabled(features::kGuestViewMPArch));
  preferences.user_agent_override = ua_override_;
}

void WebViewGuest::SetUserAgentOverride(const std::string& ua_string_override) {
  bool is_overriding_ua_string = !ua_string_override.empty();
  if (is_overriding_ua_string) {
    base::RecordAction(UserMetricsAction("WebView.Guest.OverrideUA"));

    if (!net::HttpUtil::IsValidHeaderValue(ua_string_override)) {
      return;
    }
  }

  std::optional<blink::UserAgentOverride> default_user_agent_override =
      web_view_guest_delegate_
          ? web_view_guest_delegate_->GetDefaultUserAgentOverride()
          : std::nullopt;

  is_overriding_user_agent_ =
      is_overriding_ua_string || default_user_agent_override.has_value();

  // `ua_string_override` may change the "User-Agent" header. 2 possible cases
  // for `ua_string_override`:
  // - Non-empty string "abc" (i.e. app is setting a special user-agent).
  // - Empty string "" (i.e. app is not overriding user-agent or app is revoking
  // a special user-agent).

  // `default_user_agent_override` may change the "User-Agent" header and the
  // client hints user agent headers(i.e. Sec-CH-UA*). 2 possible cases for
  // `default_user_agent_override`:
  // - nullopt (i.e. guest does not have a special override).
  // - non-null (i.e. guest has a special override).
  //   - If `default_user_agent_override` has value, then the
  //   `ua_string_override` string within must also be non-empty.

  if (default_user_agent_override.has_value()) {
    CHECK(!default_user_agent_override->ua_string_override.empty());
    if (is_overriding_ua_string) {
      default_user_agent_override->ua_string_override = ua_string_override;
    }
  }

  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    blink::UserAgentOverride new_ua_override =
        default_user_agent_override.value_or(
            blink::UserAgentOverride::UserAgentOnly(ua_string_override));

    if (ua_override_ != new_ua_override) {
      ua_override_ = new_ua_override;
      // Force an update to sync renderer preferences.
      web_contents()->SyncRendererPrefs();
      UserAgentOverrideSet(ua_override_);
    }
  } else {
    web_contents()->SetUserAgentOverride(
        default_user_agent_override.value_or(
            blink::UserAgentOverride::UserAgentOnly(ua_string_override)),
        false);
  }
}

void WebViewGuest::SetClientHintsEnabled(bool enable) {
  if (web_view_guest_delegate_) {
    web_view_guest_delegate_->SetClientHintsEnabled(enable);
  }
  UpdateUserAgentMetadata();
}

void WebViewGuest::UpdateUserAgentMetadata() {
  std::optional<blink::UserAgentOverride> default_user_agent_override =
      web_view_guest_delegate_
          ? web_view_guest_delegate_->GetDefaultUserAgentOverride()
          : std::nullopt;

  std::string retained_ua_string_override;
  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    retained_ua_string_override = ua_override_.ua_string_override;
  } else {
    retained_ua_string_override =
        web_contents()->GetUserAgentOverride().ua_string_override;
  }

  is_overriding_user_agent_ = !retained_ua_string_override.empty() ||
                              default_user_agent_override.has_value();

  if (default_user_agent_override.has_value() &&
      !retained_ua_string_override.empty()) {
    default_user_agent_override->ua_string_override =
        retained_ua_string_override;
  }

  blink::UserAgentOverride new_user_agent_override =
      default_user_agent_override.value_or(
          blink::UserAgentOverride::UserAgentOnly(retained_ua_string_override));

  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    ua_override_ = new_user_agent_override;

    // Force an update to sync renderer preferences.
    web_contents()->SyncRendererPrefs();
    UserAgentOverrideSet(ua_override_);
  } else {
    web_contents()->SetUserAgentOverride(new_user_agent_override, false);
  }
}

void WebViewGuest::Stop() {
  web_contents()->Stop();
}

void WebViewGuest::Terminate() {
  base::RecordAction(UserMetricsAction("WebView.Guest.Terminate"));
  base::ProcessHandle process_handle =
      GetGuestMainFrame()->GetProcess()->GetProcess().Handle();
  if (process_handle) {
    GetGuestMainFrame()->GetProcess()->Shutdown(content::RESULT_CODE_KILLED);
  }
}

bool WebViewGuest::ClearData(base::Time remove_since,
                             uint32_t removal_mask,
                             base::OnceClosure callback) {
  base::RecordAction(UserMetricsAction("WebView.Guest.ClearData"));
  auto* guest_main_frame = GetGuestMainFrame();
  DCHECK(guest_main_frame);
  content::StoragePartition* partition =
      guest_main_frame->GetStoragePartition();

  if (!partition) {
    return false;
  }

  if (removal_mask & webview::WEB_VIEW_REMOVE_DATA_MASK_CACHE) {
    // First clear http cache data and then clear the code cache in
    // |ClearCodeCache| and the rest is cleared in |ClearDataInternal|.
    int render_process_id = guest_main_frame->GetProcess()->GetDeprecatedID();
    // We need to clear renderer cache separately for our process because
    // StoragePartitionHttpCacheDataRemover::ClearData() does not clear that.
    web_cache::WebCacheManager::GetInstance()->ClearCacheForProcess(
        render_process_id);

    base::OnceClosure cache_removal_done_callback = base::BindOnce(
        &WebViewGuest::ClearCodeCache, weak_ptr_factory_.GetWeakPtr(),
        remove_since, removal_mask, std::move(callback));

    // We cannot use |BrowsingDataRemover| here since it doesn't support
    // non-default StoragePartition.
    partition->GetNetworkContext()->ClearHttpCache(
        remove_since, base::Time::Now(), nullptr /* ClearDataFilter */,
        std::move(cache_removal_done_callback));
    return true;
  }

  ClearDataInternal(remove_since, removal_mask, std::move(callback));
  return true;
}

WebViewGuest::WebViewGuest(content::RenderFrameHost* owner_rfh)
    : GuestView<WebViewGuest>(owner_rfh),
      rules_registry_id_(rules_registry_ids::kInvalidRulesRegistryID),
      find_helper_(this),
      javascript_dialog_helper_(this),
      web_view_guest_delegate_(
          ExtensionsAPIClient::Get()->CreateWebViewGuestDelegate(this)),
      is_spatial_navigation_enabled_(
          base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kEnableSpatialNavigation)) {
  if (IsOwnedByControlledFrameEmbedder()) {
    page_load_metrics::MetricsWebContentsObserver::RecordFeatureUsage(
        owner_rfh, blink::mojom::WebFeature::kControlledFrameElement);
  }
}

WebViewGuest::~WebViewGuest() {
  if (!attached() && GetOpener()) {
    GetOpener()->pending_new_windows_.erase(this);
  }

  auto pending_new_windows = std::move(pending_new_windows_);
  for (auto& pending_new_window : pending_new_windows) {
    std::unique_ptr<GuestViewBase> owned_guest =
        GuestViewManager::FromBrowserContext(browser_context())
            ->TransferOwnership(pending_new_window.first);
    owned_guest.reset();
  }

  // For ease of understanding, we manually clear any unattached, owned
  // guest WebContents/pages before we finish running the destructor of
  // WebViewGuest. This is because destroying the guest page will trigger
  // WebContentsObserver notifications which call back into this class. If we
  // wait to destroy the guest page in GuestViewBase's destructor, then only the
  // base class' WCO overrides will be called.
  ClearOwnedGuestContents();
  ClearOwnedGuestPage();
}

void WebViewGuest::DidFinishNavigation(
    content::NavigationHandle* navigation_handle) {
  if (!IsObservedNavigationWithinGuest(navigation_handle)) {
    return;
  }
  if (navigation_handle->IsErrorPage() || !navigation_handle->HasCommitted()) {
    // Suppress loadabort for "mailto" URLs.
    // Also during destruction, the owner is null so there's no point
    // trying to send the event.
    if (!navigation_handle->GetURL().SchemeIs(url::kMailToScheme) &&
        owner_rfh()) {
      // If a load is blocked, either by WebRequest or security checks, the
      // navigation may or may not have committed. So if we don't see an error
      // code, mark it as blocked.
      int error_code = navigation_handle->GetNetErrorCode();
      if (error_code == net::OK) {
        error_code = net::ERR_BLOCKED_BY_CLIENT;
      }
      LoadAbort(IsObservedNavigationWithinGuestMainFrame(navigation_handle),
                navigation_handle->GetURL(), error_code);
    }
    // Originally, on failed navigations the webview we would fire a loadabort
    // (for the failed navigation) and a loadcommit (for the error page).
    if (!navigation_handle->IsErrorPage()) {
      return;
    }
  }

  if (IsObservedNavigationWithinGuestMainFrame(navigation_handle) &&
      pending_zoom_factor_) {
    // Handle a pending zoom if one exists.
    SetZoom(pending_zoom_factor_);
    pending_zoom_factor_ = 0.0;
  }

  base::Value::Dict args;
  args.Set(guest_view::kUrl, navigation_handle->GetURL().spec());
  args.Set(kInternalVisibleUrl,
           GetController().GetVisibleEntry()->GetVirtualURL().spec());
  args.Set(guest_view::kIsTopLevel,
           IsObservedNavigationWithinGuestMainFrame(navigation_handle));
  args.Set(
      kInternalBaseURLForDataURL,
      GetController().GetLastCommittedEntry()->GetBaseURLForDataURL().spec());
  args.Set(kInternalCurrentEntryIndex, GetController().GetCurrentEntryIndex());
  args.Set(kInternalEntryCount, GetController().GetEntryCount());
  args.Set(kInternalProcessId,
           GetGuestMainFrame()->GetProcess()->GetDeprecatedID());
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventLoadCommit, std::move(args)));

  find_helper_.CancelAllFindSessions();
}

void WebViewGuest::GuestViewDidChangeLoadProgress(double progress) {
  base::Value::Dict args;
  args.Set(guest_view::kUrl,
           GetController().GetLastCommittedEntry()->GetVirtualURL().spec());
  args.Set(webview::kProgress, progress);
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventLoadProgress, std::move(args)));
}

void WebViewGuest::GuestViewDocumentOnLoadCompleted() {
  base::Value::Dict args;
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventContentLoad, std::move(args)));
}

void WebViewGuest::DidStartNavigation(
    content::NavigationHandle* navigation_handle) {
  if (!IsObservedNavigationWithinGuest(navigation_handle)) {
    return;
  }

  WebViewGuest* opener = GetOpener();
  if (opener && IsObservedNavigationWithinGuestMainFrame(navigation_handle)) {
    auto it = opener->pending_new_windows_.find(this);
    if (it != opener->pending_new_windows_.end()) {
      NewWindowInfo& info = it->second;
      info.did_start_navigating_away_from_initial_url = true;
    }
  }

  // loadStart shouldn't be sent for same document navigations.
  if (navigation_handle->IsSameDocument()) {
    return;
  }

  base::Value::Dict args;
  args.Set(guest_view::kUrl, navigation_handle->GetURL().spec());
  args.Set(guest_view::kIsTopLevel,
           IsObservedNavigationWithinGuestMainFrame(navigation_handle));
  DispatchEventToView(std::make_unique<GuestViewEvent>(webview::kEventLoadStart,
                                                       std::move(args)));
}

void WebViewGuest::DidRedirectNavigation(
    content::NavigationHandle* navigation_handle) {
  if (!IsObservedNavigationWithinGuest(navigation_handle)) {
    return;
  }
  base::Value::Dict args;
  args.Set(guest_view::kIsTopLevel,
           IsObservedNavigationWithinGuestMainFrame(navigation_handle));
  args.Set(webview::kNewURL, navigation_handle->GetURL().spec());
  auto redirect_chain = navigation_handle->GetRedirectChain();
  DCHECK_GE(redirect_chain.size(), 2u);
  auto old_url = redirect_chain[redirect_chain.size() - 2];
  args.Set(webview::kOldURL, old_url.spec());
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventLoadRedirect, std::move(args)));
}

void WebViewGuest::GuestViewMainFrameProcessGone(
    base::TerminationStatus status) {
  // Cancel all find sessions in progress.
  find_helper_.CancelAllFindSessions();

  base::Value::Dict args;
  args.Set(webview::kProcessId,
           GetGuestMainFrame()->GetProcess()->GetDeprecatedID());
  args.Set(webview::kReason, TerminationStatusToString(status));
  DispatchEventToView(
      std::make_unique<GuestViewEvent>(webview::kEventExit, std::move(args)));
}

void WebViewGuest::UserAgentOverrideSet(
    const blink::UserAgentOverride& ua_override) {
  content::NavigationController& controller = GetController();
  content::NavigationEntry* entry = controller.GetVisibleEntry();
  if (!entry) {
    return;
  }
  entry->SetIsOverridingUserAgent(!ua_override.ua_string_override.empty());

  // If we're on the initial NavigationEntry and no navigation had committed,
  // return early. This preserves legacy behavior when the initial
  // NavigationEntry used to not exist (which might still happen if the
  // InitialNavigationEntry is disabled).
  if (controller.IsInitialNavigation()) {
    return;
  }
  controller.Reload(content::ReloadType::NORMAL, false);
}

void WebViewGuest::FrameNameChanged(RenderFrameHost* render_frame_host,
                                    const std::string& name) {
  if (!IsObservedRenderFrameHostWithinGuest(render_frame_host)) {
    return;
  }

  if (render_frame_host->GetParentOrOuterDocument()) {
    return;
  }

  if (name_ == name) {
    return;
  }

  // WebViewGuest does not support back/forward cache or prerendering so
  // `render_frame_host` should be either active or pending deletion.
  //
  // Note that the name change could also happen from WebViewGuest itself
  // before a navigation commits (see WebViewGuest::RenderFrameCreated). In
  // that case, `render_frame_host` could also be pending commit, but `name`
  // should already match `name_` and we should early return above. Hence it is
  // important to order this check after that redundant name check.
  DCHECK(render_frame_host->IsActive() ||
         render_frame_host->IsInLifecycleState(
             RenderFrameHost::LifecycleState::kPendingDeletion));

  ReportFrameNameChange(name);
}

void WebViewGuest::OnAudioStateChanged(bool audible) {
  base::Value::Dict args;
  args.Set(webview::kAudible, audible);
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventAudioStateChanged, std::move(args)));
}

void WebViewGuest::OnDidAddMessageToConsole(
    content::RenderFrameHost* source_frame,
    blink::mojom::ConsoleMessageLevel log_level,
    const std::u16string& message,
    int32_t line_no,
    const std::u16string& source_id,
    const std::optional<std::u16string>& untrusted_stack_trace) {
  if (!IsObservedRenderFrameHostWithinGuest(source_frame)) {
    return;
  }

  base::Value::Dict args;
  // Log levels are from base/logging.h: LogSeverity.
  args.Set(webview::kLevel, blink::ConsoleMessageLevelToLogSeverity(log_level));
  args.Set(webview::kMessage, message);
  args.Set(webview::kLine, line_no);
  args.Set(webview::kSourceId, source_id);
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventConsoleMessage, std::move(args)));
}

void WebViewGuest::RenderFrameCreated(
    content::RenderFrameHost* render_frame_host) {
  if (!IsObservedRenderFrameHostWithinGuest(render_frame_host)) {
    return;
  }

  CHECK_EQ(render_frame_host->GetProcess()->IsForGuestsOnly(),
           render_frame_host->GetSiteInstance()->IsGuest());

  // TODO(mcnee): Throughout this file, many of the SiteInstance `IsGuest()`
  // checks appear redundant. Could they be CHECKs instead?
  if (!render_frame_host->GetSiteInstance()->IsGuest()) {
    return;
  }

  PushWebViewStateToIOThread(render_frame_host);

  if (!render_frame_host->GetParentOrOuterDocument()) {
    ExtensionWebContentsObserver::GetForWebContents(web_contents())
        ->GetLocalFrameChecked(render_frame_host)
        .SetFrameName(name_);
    SetTransparency(render_frame_host);
  }
}

void WebViewGuest::RenderFrameDeleted(
    content::RenderFrameHost* render_frame_host) {
  if (!IsObservedRenderFrameHostWithinGuest(render_frame_host)) {
    return;
  }

  if (!render_frame_host->GetSiteInstance()->IsGuest()) {
    return;
  }

  WebViewRendererState::GetInstance()->RemoveGuest(
      render_frame_host->GetProcess()->GetDeprecatedID(),
      render_frame_host->GetRoutingID());
}

void WebViewGuest::RenderFrameHostChanged(content::RenderFrameHost* old_host,
                                          content::RenderFrameHost* new_host) {
  if (!IsObservedRenderFrameHostWithinGuest(new_host)) {
    return;
  }

  if (!old_host || !old_host->GetSiteInstance()->IsGuest()) {
    return;
  }

  // A guest RenderFrameHost cannot navigate to a non-guest RenderFrameHost.
  DCHECK(new_host->GetSiteInstance()->IsGuest());

  // If we've swapped from a non-live guest RenderFrameHost, we won't hear a
  // RenderFrameDeleted for that RenderFrameHost.  This ensures that it's
  // removed from WebViewRendererState.  Note that it would be too early to
  // remove live RenderFrameHosts here, as they could still need their
  // WebViewRendererState entry while in pending deletion state.  For those
  // cases, we rely on calling RemoveGuest() from RenderFrameDeleted().
  if (!old_host->IsRenderFrameLive()) {
    WebViewRendererState::GetInstance()->RemoveGuest(
        old_host->GetProcess()->GetDeprecatedID(), old_host->GetRoutingID());
  }
}

void WebViewGuest::ReportFrameNameChange(const std::string& name) {
  name_ = name;
  base::Value::Dict args;
  args.Set(webview::kName, name);
  DispatchEventToView(std::make_unique<GuestViewEvent>(
      webview::kEventFrameNameChanged, std::move(args)));
}

void WebViewGuest::PushWebViewStateToIOThread(
    content::RenderFrameHost* guest_host) {
  if (!guest_host->GetSiteInstance()->IsGuest()) {
    NOTREACHED();
  }
  auto storage_partition_config =
      guest_host->GetSiteInstance()->GetStoragePartitionConfig();

  WebViewRendererState::WebViewInfo web_view_info;
  web_view_info.embedder_process_id = owner_rfh()->GetProcess()->GetID();
  web_view_info.instance_id = view_instance_id();
  web_view_info.partition_id = storage_partition_config.partition_name();
  web_view_info.owner_host = owner_host();
  web_view_info.rules_registry_id = rules_registry_id_;

  // Get content scripts IDs added by the guest.
  WebViewContentScriptManager* manager =
      WebViewContentScriptManager::Get(browser_context());
  DCHECK(manager);
  web_view_info.content_script_ids = manager->GetContentScriptIDSet(
      web_view_info.embedder_process_id.value(), web_view_info.instance_id);

  WebViewRendererState::GetInstance()->AddGuest(
      guest_host->GetProcess()->GetDeprecatedID(), guest_host->GetRoutingID(),
      web_view_info);
}

void WebViewGuest::RequestMediaAccessPermission(
    WebContents* source,
    const content::MediaStreamRequest& request,
    content::MediaResponseCallback callback) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  GuestRequestMediaAccessPermission(request, std::move(callback));
}

bool WebViewGuest::CheckMediaAccessPermission(
    content::RenderFrameHost* render_frame_host,
    const url::Origin& security_origin,
    blink::mojom::MediaStreamType type) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  return GuestCheckMediaAccessPermission(render_frame_host, security_origin,
                                         type);
}

void WebViewGuest::CanDownload(const GURL& url,
                               const std::string& request_method,
                               base::OnceCallback<void(bool)> callback) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  web_view_permission_helper_->CanDownload(url, request_method,
                                           std::move(callback));
}

void WebViewGuest::OnOwnerAudioMutedStateUpdated(bool muted) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));
  CHECK(web_contents());

  // Mute the guest WebContents if the owner WebContents has been muted.
  if (muted) {
    web_contents()->SetAudioMuted(muted);
    return;
  }

  // Apply the stored muted state of the guest WebContents if the owner
  // WebContents is not muted.
  web_contents()->SetAudioMuted(is_audio_muted_);
}

void WebViewGuest::SignalWhenReady(base::OnceClosure callback) {
  auto* manager = WebViewContentScriptManager::Get(browser_context());
  manager->SignalOnScriptsUpdated(std::move(callback));
}

void WebViewGuest::WillAttachToEmbedder() {
  rules_registry_id_ = GetOrGenerateRulesRegistryID(
      owner_rfh()->GetProcess()->GetDeprecatedID(), view_instance_id());

  // We must install the mapping from guests to WebViews prior to resuming
  // suspended resource loads so that the WebRequest API will catch resource
  // requests.
  //
  // TODO(alexmos): This may be redundant with the call in
  // RenderFrameCreated() and should be cleaned up.
  PushWebViewStateToIOThread(GetGuestMainFrame());

  if (recreate_initial_nav_) {
    SignalWhenReady(std::move(recreate_initial_nav_));
  }
}

bool WebViewGuest::RequiresSslInterstitials() const {
  // Some enterprise workflows rely on clicking through self-signed cert errors.
  return true;
}

bool WebViewGuest::IsPermissionRequestable(ContentSettingsType type) const {
  CHECK(permissions::PermissionUtil::IsPermission(type));
  const blink::PermissionType permission_type =
      permissions::PermissionUtil::ContentSettingsTypeToPermissionType(type);

  switch (permission_type) {
    case blink::PermissionType::GEOLOCATION:
    case blink::PermissionType::AUDIO_CAPTURE:
    case blink::PermissionType::VIDEO_CAPTURE:
      // Any permission that could be granted by the webview permissionrequest
      // API should be requestable.
      return true;
    case blink::PermissionType::CLIPBOARD_READ_WRITE:
    case blink::PermissionType::CLIPBOARD_SANITIZED_WRITE:
      // Support only controlled frame.
      // Technically, there's no difficulty in supporting webview also,
      // but the need for this api was expressed only for CF.
      return IsOwnedByControlledFrameEmbedder();
    default:
      // Any other permission could not be legitimately granted to the webview.
      // We preemptivly reject such requests here. The permissions system should
      // have rejected it anyway as there would be no way to prompt the user.
      // Ideally, we would just let the permissions system take care of this on
      // its own, however, since permissions are currently scoped to a
      // BrowserContext, not a StoragePartition, a permission granted to an
      // origin loaded in a regular tab could be applied to a webview, hence the
      // need to preemptively reject it.
      // TODO(crbug.com/40068594): Permissions should be scoped to
      // StoragePartitions.
      return false;
  }
}

std::optional<content::PermissionResult> WebViewGuest::OverridePermissionResult(
    ContentSettingsType type) const {
  auto result = web_view_permission_helper_->OverridePermissionResult(type);
  if (result) {
    return result;
  }

  if (IsOwnedByControlledFrameEmbedder()) {
    // Permission of content within a Controlled Frame is isolated.
    // Therefore, Controlled Frame decides what the immediate permission result
    // is.
    const blink::PermissionType permission_type =
        permissions::PermissionUtil::ContentSettingsTypeToPermissionType(type);
    if (permission_type == blink::PermissionType::GEOLOCATION) {
      return content::PermissionResult(
          content::PermissionStatus::ASK,
          content::PermissionStatusSource::UNSPECIFIED);
    }
    // Returns nullopt for unhandled cases.
  }
  return std::nullopt;
}

content::JavaScriptDialogManager*
WebViewGuest::GuestGetJavascriptDialogManager() {
  return &javascript_dialog_helper_;
}

content::JavaScriptDialogManager* WebViewGuest::GetJavaScriptDialogManager(
    WebContents* source) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  return &javascript_dialog_helper_;
}

void WebViewGuest::NavigateGuest(
    const std::string& src,
    base::OnceCallback<void(content::NavigationHandle&)>
        navigation_handle_callback,
    bool force_navigation) {
  if (src.empty()) {
    return;
  }

  GURL url = ResolveURL(src);

  // We wait for all the content scripts to load and then navigate the guest
  // if the navigation is embedder-initiated. For browser-initiated navigations,
  // content scripts will be ready.
  if (force_navigation) {
    SignalWhenReady(base::BindOnce(
        &WebViewGuest::LoadURLWithParams, weak_ptr_factory_.GetWeakPtr(), url,
        content::Referrer(), ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
        std::move(navigation_handle_callback), force_navigation));
    return;
  }
  LoadURLWithParams(url, content::Referrer(), ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
                    std::move(navigation_handle_callback), force_navigation);
}

bool WebViewGuest::HandleKeyboardShortcuts(
    const input::NativeWebKeyboardEvent& event) {
  // Only <controlledframe> and <webview> in Chrome Apps handle keyboard
  // shortcuts. <webview> instances in WebUI, etc, do not.
  GuestViewManager* manager =
      GuestViewManager::FromBrowserContext(browser_context());
  if (!manager->IsOwnedByExtension(this) &&
      !manager->IsOwnedByControlledFrameEmbedder(this)) {
    return false;
  }

  if (event.GetType() != blink::WebInputEvent::Type::kRawKeyDown) {
    return false;
  }

  // If the user hits the escape key without any modifiers then unlock the
  // mouse if necessary.
  if ((event.windows_key_code == ui::VKEY_ESCAPE) &&
      !(event.GetModifiers() & blink::WebInputEvent::kInputModifiers)) {
    return web_contents()->GotResponseToPointerLockRequest(
        blink::mojom::PointerLockResult::kUserRejected);
  }

#if BUILDFLAG(IS_MAC)
  if (event.GetModifiers() != blink::WebInputEvent::kMetaKey) {
    return false;
  }

  if (event.windows_key_code == ui::VKEY_OEM_4) {
    Go(-1);
    return true;
  }

  if (event.windows_key_code == ui::VKEY_OEM_6) {
    Go(1);
    return true;
  }
#else
  if (event.windows_key_code == ui::VKEY_BROWSER_BACK) {
    Go(-1);
    return true;
  }

  if (event.windows_key_code == ui::VKEY_BROWSER_FORWARD) {
    Go(1);
    return true;
  }
#endif

  return false;
}

void WebViewGuest::ApplyAttributes(const base::Value::Dict& params) {
  if (const std::string* name = params.FindString(kAttributeName)) {
    // If the guest window's name is empty, then the WebView tag's name is
    // assigned. Otherwise, the guest window's name takes precedence over the
    // WebView tag's name.
    if (name_.empty()) {
      SetName(*name);
    }
  }
  if (attached()) {
    ReportFrameNameChange(name_);
  }

  const std::string* user_agent_override =
      params.FindString(kParameterUserAgentOverride);
  SetUserAgentOverride(user_agent_override ? *user_agent_override : "");

  std::optional<bool> allow_transparency =
      params.FindBool(kAttributeAllowTransparency);
  if (allow_transparency) {
    // We need to set the background opaque flag after navigation to ensure that
    // there is a RenderWidgetHostView available.
    SetAllowTransparency(*allow_transparency);
  }

  std::optional<bool> allow_scaling = params.FindBool(kAttributeAllowScaling);
  if (allow_scaling) {
    SetAllowScaling(*allow_scaling);
  }

  // Check for a pending zoom from before the first navigation.
  pending_zoom_factor_ =
      params.FindDouble(kInitialZoomFactor).value_or(pending_zoom_factor_);

  bool is_pending_new_window = false;
  WebViewGuest* opener = GetOpener();
  if (opener) {
    // We need to do a navigation here if the target URL has changed between
    // the time the WebContents was created and the time it was attached.
    // We also need to do an initial navigation if a RenderView was never
    // created for the new window in cases where there is no referrer.
    auto it = opener->pending_new_windows_.find(this);
    if (it != opener->pending_new_windows_.end()) {
      const NewWindowInfo& new_window_info = it->second;
      if (!new_window_info.did_start_navigating_away_from_initial_url &&
          (new_window_info.url_changed_via_open_url || !HasOpener())) {
        NavigateGuest(new_window_info.url.spec(),
                      /*navigation_handle_callback=*/{},
                      false /* force_navigation */);
      }

      // Once a new guest is attached to the DOM of the embedder page, then the
      // lifetime of the new guest is no longer managed by the opener guest.
      opener->pending_new_windows_.erase(this);

      is_pending_new_window = true;
    }
  }

  // Only read the src attribute if this is not a New Window API flow.
  if (!is_pending_new_window) {
    if (const std::string* src = params.FindString(kAttributeSrc)) {
      NavigateGuest(*src, /*navigation_handle_callback=*/{},
                    true /* force_navigation */);
    }
  }

  if (recreate_initial_nav_) {
    SignalWhenReady(std::move(recreate_initial_nav_));
  }
}

void WebViewGuest::ShowContextMenu(int request_id) {
  if (web_view_guest_delegate_) {
    web_view_guest_delegate_->OnShowContextMenu(request_id);
  }
}

void WebViewGuest::SetName(const std::string& name) {
  if (name_ == name) {
    return;
  }
  name_ = name;

  // Return early if this method is called before RenderFrameCreated().
  // In that case, we still update the name in RenderFrameCreated().
  if (!GetGuestMainFrame()->IsRenderFrameLive()) {
    return;
  }
  ExtensionWebContentsObserver::GetForWebContents(web_contents())
      ->GetLocalFrameChecked(GetGuestMainFrame())
      .SetFrameName(name_);
}

void WebViewGuest::SetSpatialNavigationEnabled(bool enabled) {
  if (is_spatial_navigation_enabled_ == enabled) {
    return;
  }
  is_spatial_navigation_enabled_ = enabled;
  ExtensionWebContentsObserver::GetForWebContents(web_contents())
      ->GetLocalFrameChecked(GetGuestMainFrame())
      .SetSpatialNavigationEnabled(enabled);
}

bool WebViewGuest::IsSpatialNavigationEnabled() const {
  return is_spatial_navigation_enabled_;
}

void WebViewGuest::SetZoom(double zoom_factor) {
  did_set_explicit_zoom_ = true;
  auto* zoom_controller = GetZoomController();
  DCHECK(zoom_controller);
  double zoom_level = blink::ZoomFactorToZoomLevel(zoom_factor);
  zoom_controller->SetZoomLevel(zoom_level);
}

void WebViewGuest::SetZoomMode(ZoomController::ZoomMode zoom_mode) {
  GetZoomController()->SetZoomMode(zoom_mode);
}

void WebViewGuest::SetAllowTransparency(bool allow) {
  if (allow_transparency_ == allow) {
    return;
  }

  allow_transparency_ = allow;

  SetTransparency(GetGuestMainFrame());
}

void WebViewGuest::SetAudioMuted(bool mute) {
  // Only update the muted state if the owner WebContents is not muted to
  // prevent the guest frame from ignoring the muted state of the owner.
  is_audio_muted_ = mute;

  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    GetGuestPageHolder().SetAudioMuted(mute);
  } else {
    CHECK(web_contents());
    CHECK(owner_web_contents());
    if (owner_web_contents()->IsAudioMuted()) {
      return;
    }
    web_contents()->SetAudioMuted(is_audio_muted_);
  }
}

bool WebViewGuest::IsAudioMuted() {
  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    return GetGuestPageHolder().IsAudioMuted();
  } else {
    CHECK(web_contents());
    return web_contents()->IsAudioMuted();
  }
}

void WebViewGuest::SetTransparency(
    content::RenderFrameHost* render_frame_host) {
  auto* view = render_frame_host->GetView();
  if (!view) {
    return;
  }

  if (allow_transparency_) {
    view->SetBackgroundColor(SK_ColorTRANSPARENT);
  } else {
    view->SetBackgroundColor(SK_ColorWHITE);
  }
}

void WebViewGuest::SetAllowScaling(bool allow) {
  allow_scaling_ = allow;
}

bool WebViewGuest::ShouldResumeRequestsForCreatedWindow() {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  // Delay so that the embedder page has a chance to call APIs such as
  // webRequest in time to be applied to the initial navigation in the new guest
  // contents. We resume during AttachToOuterWebContentsFrame.
  return false;
}

content::WebContents* WebViewGuest::AddNewContents(
    WebContents* source,
    std::unique_ptr<WebContents> new_contents,
    const GURL& target_url,
    WindowOpenDisposition disposition,
    const blink::mojom::WindowFeatures& window_features,
    bool user_gesture,
    bool* was_blocked) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  if (was_blocked) {
    *was_blocked = false;
  }

  // This is the guest we created during CreateNewGuestWindow. We can now take
  // ownership of it.
  WebViewGuest* web_view_guest =
      WebViewGuest::FromWebContents(new_contents.get());
  DCHECK_NE(this, web_view_guest);

  std::unique_ptr<GuestViewBase> owned_guest =
      GuestViewManager::FromBrowserContext(browser_context())
          ->TransferOwnership(web_view_guest);
  std::unique_ptr<WebViewGuest> owned_web_view_guest =
      base::WrapUnique(static_cast<WebViewGuest*>(owned_guest.release()));
  owned_web_view_guest->TakeGuestContentsOwnership(std::move(new_contents));

  RequestNewWindowPermission(disposition, window_features.bounds,
                             std::move(owned_web_view_guest));
  return nullptr;
}

WebContents* WebViewGuest::OpenURLFromTab(
    WebContents* source,
    const content::OpenURLParams& params,
    base::OnceCallback<void(content::NavigationHandle&)>
        navigation_handle_callback) {
  // Most navigations should be handled by WebViewGuest::LoadURLWithParams,
  // which takes care of blocking chrome:// URLs and other web-unsafe schemes.
  // (NavigateGuest and CreateNewGuestWebViewWindow also go through
  // LoadURLWithParams.)
  //
  // We make an exception here for context menu items, since the Language
  // Settings item uses a browser-initiated navigation to a chrome:// URL.
  // These can be passed to the embedder's WebContentsDelegate so that the
  // browser performs the action for the <webview>. Navigations to a new
  // tab, etc., are also handled by the WebContentsDelegate.
  if (!params.is_renderer_initiated &&
      (!content::ChildProcessSecurityPolicy::GetInstance()->IsWebSafeScheme(
           params.url.scheme()) ||
       params.disposition != WindowOpenDisposition::CURRENT_TAB)) {
    if (!owner_web_contents()->GetDelegate()) {
      return nullptr;
    }
    return owner_web_contents()->GetDelegate()->OpenURLFromTab(
        owner_web_contents(), params, std::move(navigation_handle_callback));
  }

  if (!attached()) {
    WebViewGuest* opener = GetOpener();
    // If the guest wishes to navigate away prior to attachment then we save the
    // navigation to perform upon attachment. Navigation initializes a lot of
    // state that assumes an embedder exists, such as RenderWidgetHostViewGuest.
    // Navigation also resumes resource loading. If we were created using
    // newwindow (i.e. we have an opener), we don't allow navigation until
    // attachment.
    if (opener) {
      auto it = opener->pending_new_windows_.find(this);
      if (it == opener->pending_new_windows_.end()) {
        return nullptr;
      }
      const NewWindowInfo& info = it->second;
      // TODO(https://crbug.com/40275094): Consider plumbing
      // `navigation_handle_callback`.
      NewWindowInfo new_window_info(params.url, info.name);
      new_window_info.url_changed_via_open_url =
          new_window_info.url != info.url;
      it->second = new_window_info;
      return nullptr;
    }
  }

  // This code path is taken if RenderFrameImpl::DecidePolicyForNavigation
  // decides that a fork should happen. At the time of writing this comment,
  // the only way a well behaving guest could hit this code path is if it
  // navigates to the New Tab page URL of the default search engine (see
  // search::GetNewTabPageURL). Validity checks are performed inside
  // LoadURLWithParams such that if the guest attempts to navigate to a URL that
  // it is not allowed to navigate to, a 'loadabort' event will fire in the
  // embedder, and the guest will be navigated to about:blank.
  if (params.disposition == WindowOpenDisposition::CURRENT_TAB) {
    LoadURLWithParams(params.url, params.referrer, params.transition,
                      std::move(navigation_handle_callback),
                      true /* force_navigation */);
    return web_contents();
  }

  // This code path is taken if Ctrl+Click, middle click or any of the
  // keyboard/mouse combinations are used to open a link in a new tab/window.
  // This code path is also taken on client-side redirects from about:blank.
  // TODO(https://crbug.com/40275094): Consider plumbing
  // `navigation_handle_callback`.
  CreateNewGuestWebViewWindow(params);
  return nullptr;
}

void WebViewGuest::WebContentsCreated(WebContents* source_contents,
                                      int opener_render_process_id,
                                      int opener_render_frame_id,
                                      const std::string& frame_name,
                                      const GURL& target_url,
                                      WebContents* new_contents) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  // The `new_contents` is the one we just created in CreateNewGuestWindow.
  auto* guest = WebViewGuest::FromWebContents(new_contents);
  CHECK(guest);
  guest->SetOpener(this);
  guest->name_ = frame_name;
  pending_new_windows_.insert(
      std::make_pair(guest, NewWindowInfo(target_url, frame_name)));
}

void WebViewGuest::EnterFullscreenModeForTab(
    content::RenderFrameHost* requesting_frame,
    const blink::mojom::FullscreenOptions& options) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  // TODO(lazyboy): Right now the guest immediately goes fullscreen within its
  // bounds. If the embedder denies the permission then we will see a flicker.
  // Once we have the ability to "cancel" a renderer/ fullscreen request:
  // http://crbug.com/466854 this won't be necessary and we should be
  // Calling SetFullscreenState(true) once the embedder allowed the request.
  // Otherwise we would cancel renderer/ fullscreen if the embedder denied.
  SetFullscreenState(true);

  // Ask the embedder for permission.
  web_view_permission_helper_->RequestFullscreenPermission(
      requesting_frame->GetLastCommittedOrigin(),
      base::BindOnce(&WebViewGuest::OnFullscreenPermissionDecided,
                     weak_ptr_factory_.GetWeakPtr()));
}

void WebViewGuest::ExitFullscreenModeForTab(WebContents* web_contents) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  SetFullscreenState(false);
}

bool WebViewGuest::IsFullscreenForTabOrPending(
    const WebContents* web_contents) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  return is_guest_fullscreen_;
}

void WebViewGuest::RequestPointerLock(WebContents* web_contents,
                                      bool user_gesture,
                                      bool last_unlocked_by_target) {
  CHECK(!base::FeatureList::IsEnabled(features::kGuestViewMPArch));

  web_view_permission_helper_->RequestPointerLockPermission(
      user_gesture, last_unlocked_by_target,
      base::BindOnce(
          base::IgnoreResult(&WebContents::GotPointerLockPermissionResponse),
          base::Unretained(web_contents)));
}

void WebViewGuest::LoadURLWithParams(
    const GURL& url,
    const content::Referrer& referrer,
    ui::PageTransition transition_type,
    base::OnceCallback<void(content::NavigationHandle&)>
        navigation_handle_callback,
    bool force_navigation) {
  if (!attached() && base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    pending_first_navigation_ =
        base::BindOnce(&WebViewGuest::LoadURLWithParams, GetWeakPtr(), url,
                       referrer, transition_type,
                       std::move(navigation_handle_callback), force_navigation);
    return;
  }

  if (!url.is_valid()) {
    LoadAbort(true /* is_top_level */, url, net::ERR_INVALID_URL);
    NavigateGuest(url::kAboutBlankURL, std::move(navigation_handle_callback),
                  false /* force_navigation */);
    return;
  }

  bool scheme_is_blocked =
      (!content::ChildProcessSecurityPolicy::GetInstance()->IsWebSafeScheme(
           url.scheme()) &&
       !url.SchemeIs(url::kAboutScheme)) ||
      url.SchemeIs(url::kJavaScriptScheme);

  // Check for delegates that may block access to specific schemes, such as
  // Controlled Frame.
  if (web_view_guest_delegate_ &&
      web_view_guest_delegate_->NavigateToURLShouldBlock(url)) {
    scheme_is_blocked = true;
  }

  // Do not allow navigating a guest to schemes other than known safe schemes.
  // This will block the embedder trying to load unwanted schemes, e.g.
  // chrome://.
  if (scheme_is_blocked) {
    LoadAbort(true /* is_top_level */, url, net::ERR_DISALLOWED_URL_SCHEME);
    NavigateGuest(url::kAboutBlankURL, std::move(navigation_handle_callback),
                  false /* force_navigation */);
    return;
  }

  if (!force_navigation) {
    content::NavigationEntry* last_committed_entry =
        GetController().GetLastCommittedEntry();
    if (last_committed_entry && last_committed_entry->GetURL() == url) {
      return;
    }
  }

  GURL validated_url(url);
  GetGuestMainFrame()->GetProcess()->FilterURL(false, &validated_url);
  // As guests do not swap processes on navigation, only navigations to
  // normal web URLs are supported.  No protocol handlers are installed for
  // other schemes (e.g., WebUI or extensions), and no permissions or bindings
  // can be granted to the guest process.
  content::NavigationController::LoadURLParams load_url_params(validated_url);
  load_url_params.referrer = referrer;
  load_url_params.transition_type = transition_type;
  load_url_params.extra_headers = std::string();
  if (is_overriding_user_agent_) {
    load_url_params.override_user_agent =
        content::NavigationController::UA_OVERRIDE_TRUE;
  }
  base::WeakPtr<content::NavigationHandle> navigation =
      GetController().LoadURLWithParams(load_url_params);
  if (navigation_handle_callback && navigation) {
    std::move(navigation_handle_callback).Run(*navigation);
  }
}

void WebViewGuest::RequestNewWindowPermission(
    WindowOpenDisposition disposition,
    const gfx::Rect& initial_bounds,
    std::unique_ptr<WebViewGuest> new_guest) {
  if (!new_guest) {
    return;
  }
  auto it = pending_new_windows_.find(new_guest.get());
  if (it == pending_new_windows_.end()) {
    return;
  }
  const NewWindowInfo& new_window_info = it->second;

  // Retrieve the opener partition info if we have it.
  const auto storage_partition_config = new_guest->GetGuestMainFrame()
                                            ->GetSiteInstance()
                                            ->GetStoragePartitionConfig();
  std::string storage_partition_id =
      GetStoragePartitionIdFromPartitionConfig(storage_partition_config);

  const int guest_instance_id = new_guest->guest_instance_id();

  base::Value::Dict request_info;
  request_info.Set(webview::kInitialHeight, initial_bounds.height());
  request_info.Set(webview::kInitialWidth, initial_bounds.width());
  request_info.Set(webview::kTargetURL, new_window_info.url.spec());
  request_info.Set(webview::kName, new_window_info.name);
  request_info.Set(webview::kWindowID, guest_instance_id);
  // We pass in partition info so that window-s created through newwindow
  // API can use it to set their partition attribute.
  request_info.Set(webview::kStoragePartitionId, storage_partition_id);
  request_info.Set(webview::kWindowOpenDisposition,
                   WindowOpenDispositionToString(disposition));

  GuestViewManager::FromBrowserContext(browser_context())
      ->ManageOwnership(std::move(new_guest));

  web_view_permission_helper_->RequestPermission(
      WEB_VIEW_PERMISSION_TYPE_NEW_WINDOW, std::move(request_info),
      base::BindOnce(&WebViewGuest::OnWebViewNewWindowResponse,
                     weak_ptr_factory_.GetWeakPtr(), guest_instance_id),
      false /* allowed_by_default */);
}

GURL WebViewGuest::ResolveURL(const std::string& src) {
  if (!GuestViewManager::FromBrowserContext(browser_context())
           ->IsOwnedByExtension(this)) {
    return GURL(src);
  }

  GURL default_url(
      base::StringPrintf("%s://%s/", kExtensionScheme, owner_host().c_str()));
  return default_url.Resolve(src);
}

void WebViewGuest::OnWebViewNewWindowResponse(int new_window_instance_id,
                                              bool allow,
                                              const std::string& user_input) {
  auto* guest = WebViewGuest::FromInstanceID(
      owner_rfh()->GetProcess()->GetDeprecatedID(), new_window_instance_id);
  if (!guest) {
    return;
  }

  if (!allow) {
    std::unique_ptr<GuestViewBase> owned_guest =
        GuestViewManager::FromBrowserContext(browser_context())
            ->TransferOwnership(guest);
    owned_guest.reset();
  }
}

void WebViewGuest::OnFullscreenPermissionDecided(
    bool allowed,
    const std::string& user_input) {
  last_fullscreen_permission_was_allowed_by_embedder_ = allowed;
  SetFullscreenState(allowed);
}

bool WebViewGuest::GuestMadeEmbedderFullscreen() const {
  return last_fullscreen_permission_was_allowed_by_embedder_ &&
         is_embedder_fullscreen_;
}

void WebViewGuest::SetFullscreenState(bool is_fullscreen) {
  if (is_fullscreen == is_guest_fullscreen_) {
    return;
  }

  bool was_fullscreen = is_guest_fullscreen_;
  is_guest_fullscreen_ = is_fullscreen;
  // If the embedder entered fullscreen because of us, it should exit fullscreen
  // when we exit fullscreen.
  if (was_fullscreen && GuestMadeEmbedderFullscreen()) {
    // Dispatch a message so we can call document.webkitCancelFullscreen()
    // on the embedder.
    base::Value::Dict args;
    DispatchEventToView(std::make_unique<GuestViewEvent>(
        webview::kEventExitFullscreen, std::move(args)));
  }
  // Since we changed fullscreen state, sending a SynchronizeVisualProperties
  // message ensures that renderer/ sees the change.
  GetGuestMainFrame()->GetRenderWidgetHost()->SynchronizeVisualProperties();
}

bool WebViewGuest::HasOpener() {
  if (base::FeatureList::IsEnabled(features::kGuestViewMPArch)) {
    return GetGuestPageHolder().GetOpener();
  }
  return web_contents()->HasOpener();
}

}  // namespace extensions