chromium/third_party/blink/renderer/platform/widget/compositing/render_frame_metadata_observer_impl.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_COMPOSITING_RENDER_FRAME_METADATA_OBSERVER_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_COMPOSITING_RENDER_FRAME_METADATA_OBSERVER_IMPL_H_

#include "build/build_config.h"
#include "cc/mojom/render_frame_metadata.mojom-blink.h"
#include "cc/trees/render_frame_metadata.h"
#include "cc/trees/render_frame_metadata_observer.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/renderer/platform/platform_export.h"

namespace blink {

// Implementation of cc::RenderFrameMetadataObserver which exists in the
// renderer and observers frame submission. It then notifies the
// cc::mojom::RenderFrameMetadataObserverClient, which is expected to be in the
// browser process, of the metadata associated with the frame.
//
// BindToCurrentSequence should be called from the Compositor thread so that the
// Mojo pipe is properly bound.
//
// Subsequent usage should only be from the Compositor thread.
class PLATFORM_EXPORT RenderFrameMetadataObserverImpl
    : public cc::RenderFrameMetadataObserver,
      public cc::mojom::blink::RenderFrameMetadataObserver { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WIDGET_COMPOSITING_RENDER_FRAME_METADATA_OBSERVER_IMPL_H_