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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_VARIATIONS_RENDER_THREAD_OBSERVER_H_
#define CONTENT_RENDERER_VARIATIONS_RENDER_THREAD_OBSERVER_H_
#include <string>
#include <vector>
#include "components/variations/variations.mojom.h"
#include "content/common/renderer_variations_configuration.mojom.h"
#include "content/public/renderer/render_thread_observer.h"
#include "mojo/public/cpp/bindings/associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_associated_receiver.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "third_party/blink/public/common/loader/url_loader_throttle.h"
#include "url/origin.h"
namespace content {
// This is the renderer side of the FieldTrialSynchronizer which applies
// field trial group settings.
class VariationsRenderThreadObserver
: public content::RenderThreadObserver,
public mojom::RendererVariationsConfiguration {
public:
VariationsRenderThreadObserver();
VariationsRenderThreadObserver(const VariationsRenderThreadObserver&) =
delete;
VariationsRenderThreadObserver& operator=(
const VariationsRenderThreadObserver&) = delete;
~VariationsRenderThreadObserver() override;
// Appends throttles if the browser has sent a variations header to the
// renderer. |top_frame_origin| is for the top frame of a request-initiating
// frame.
static void AppendThrottleIfNeeded(
const url::Origin& top_frame_origin,
std::vector<std::unique_ptr<blink::URLLoaderThrottle>>* throttles);
// content::RenderThreadObserver:
void RegisterMojoInterfaces(
blink::AssociatedInterfaceRegistry* associated_interfaces) override;
void UnregisterMojoInterfaces(
blink::AssociatedInterfaceRegistry* associated_interfaces) override;
// content::mojom::RendererConfiguration:
void SetVariationsHeaders(
variations::mojom::VariationsHeadersPtr variations_headers) override;
void SetFieldTrialGroup(const std::string& trial_name,
const std::string& group_name) override;
private:
mojo::AssociatedReceiver<mojom::RendererVariationsConfiguration>
renderer_configuration_receiver_{this};
void OnRendererConfigurationAssociatedRequest(
mojo::PendingAssociatedReceiver<mojom::RendererVariationsConfiguration>
receiver);
};
} // namespace content
#endif // CONTENT_RENDERER_VARIATIONS_RENDER_THREAD_OBSERVER_H_
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