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// 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 "chrome/browser/extensions/chrome_process_manager_delegate.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/extension_management.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/common/chrome_switches.h"
#include "components/user_manager/user_manager.h"
#include "extensions/browser/extensions_browser_client.h"
#include "extensions/browser/process_manager.h"
#include "extensions/browser/process_manager_factory.h"
#include "extensions/common/extension.h"
#include "extensions/common/permissions/permissions_data.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "ash/constants/ash_switches.h"
#include "chrome/browser/ash/profiles/profile_helper.h"
#include "chrome/browser/extensions/component_extensions_allowlist/allowlist.h"
#endif
namespace extensions {
ChromeProcessManagerDelegate::ChromeProcessManagerDelegate() {
BrowserList::AddObserver(this);
DCHECK(g_browser_process);
// The profile manager can be null in unit tests.
if (ProfileManager* profile_manager = g_browser_process->profile_manager()) {
profile_manager_observation_.Observe(profile_manager);
// All profiles must be observed, so make sure none have been created
// that we missed.
DCHECK_EQ(0U, profile_manager->GetLoadedProfiles().size());
}
}
ChromeProcessManagerDelegate::~ChromeProcessManagerDelegate() {
DCHECK(!g_browser_process)
<< "ChromeProcessManagerDelegate expects to be shut down during "
"BrowserProcess shutdown, after |g_browser_process| is set to null";
BrowserList::RemoveObserver(this);
}
bool ChromeProcessManagerDelegate::AreBackgroundPagesAllowedForContext(
content::BrowserContext* context) const {
Profile* profile = Profile::FromBrowserContext(context);
bool is_normal_session = !profile->IsGuestSession() &&
!profile->IsSystemProfile();
// Disallow if the current session is a Guest mode session or login screen but
// the current browser context is *not* off-the-record. Such context is
// artificial and background page shouldn't be created in it.
// http://crbug.com/329498
return is_normal_session || profile->IsOffTheRecord();
}
bool ChromeProcessManagerDelegate::IsExtensionBackgroundPageAllowed(
content::BrowserContext* context,
const Extension& extension) const {
#if BUILDFLAG(IS_CHROMEOS)
Profile* profile = Profile::FromBrowserContext(context);
const bool is_signin_profile = ash::ProfileHelper::IsSigninProfile(profile) &&
!profile->IsOffTheRecord();
if (is_signin_profile) {
// Check for flag.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
::switches::kDisableLoginScreenApps)) {
return false;
}
// Get login screen apps installed by policy.
base::Value::Dict login_screen_apps_list =
ExtensionManagementFactory::GetForBrowserContext(context)
->GetForceInstallList();
// For the ChromeOS login profile, only allow apps installed by device
// policy or that are explicitly allowlisted.
return login_screen_apps_list.Find(extension.id()) ||
IsComponentExtensionAllowlistedForSignInProfile(extension.id());
}
#endif
return AreBackgroundPagesAllowedForContext(context);
}
bool ChromeProcessManagerDelegate::DeferCreatingStartupBackgroundHosts(
content::BrowserContext* context) const {
// The profile may not be valid yet if it is still being initialized.
// In that case, defer loading, since it depends on an initialized profile.
// Background hosts will be loaded later via OnProfileAdded.
return !ExtensionsBrowserClient::Get()->IsValidContext(context);
}
void ChromeProcessManagerDelegate::OnBrowserAdded(Browser* browser) {
Profile* profile = browser->profile();
DCHECK(profile);
// Inform the process manager for this profile that the window is ready.
// We continue to observe the notification in case browser windows open for
// a related incognito profile or other regular profiles.
ProcessManager::Get(profile)->MaybeCreateStartupBackgroundHosts();
// For incognito profiles also inform the original profile's process manager
// that the window is ready. This will usually be a no-op because the
// original profile's process manager should have been informed when the
// non-incognito window opened.
if (profile->IsOffTheRecord()) {
ProcessManager::Get(profile->GetOriginalProfile())
->MaybeCreateStartupBackgroundHosts();
}
}
void ChromeProcessManagerDelegate::OnProfileAdded(Profile* profile) {
observed_profiles_.AddObservation(profile);
// The profile might have been initialized asynchronously (in parallel with
// extension system startup). Now that initialization is complete the
// ProcessManager can load deferred background pages.
//
// The process manager service might not be available for some irregular
// profiles, like the System Profile.
if (ProcessManager* process_manager = ProcessManager::Get(profile)) {
process_manager->MaybeCreateStartupBackgroundHosts();
}
}
void ChromeProcessManagerDelegate::OnProfileManagerDestroying() {
profile_manager_observation_.Reset();
}
void ChromeProcessManagerDelegate::OnOffTheRecordProfileCreated(
Profile* off_the_record_profile) {
observed_profiles_.AddObservation(off_the_record_profile);
}
void ChromeProcessManagerDelegate::OnProfileWillBeDestroyed(Profile* profile) {
observed_profiles_.RemoveObservation(profile);
// Close background hosts when the last profile is closed so that they
// have time to shutdown various objects on different threads. The
// KeyedService::Shutdown override is called too late in the shutdown
// sequence. http://crbug.com/15708
auto close_background_hosts = [](Profile* profile) {
ProcessManager* manager =
ProcessManagerFactory::GetForBrowserContextIfExists(profile);
if (manager) {
manager->CloseBackgroundHosts();
}
};
close_background_hosts(profile);
// If this profile owns an incognito profile, but it is destroyed before the
// incognito profile is destroyed, then close the incognito background hosts
// as well. This happens in a few tests. http://crbug.com/138843
if (!profile->IsOffTheRecord() && profile->HasPrimaryOTRProfile()) {
Profile* otr = profile->GetPrimaryOTRProfile(/*create_if_needed=*/true);
close_background_hosts(otr);
if (observed_profiles_.IsObservingSource(otr)) {
observed_profiles_.RemoveObservation(otr);
}
}
}
} // namespace extensions
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