Remove SendBeginFramesToChildren plumbing

content/browser/renderer_host/begin_frame_observer_proxy.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_
-#define CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_
-
-#include "base/macros.h"
-#include "content/common/content_export.h"
-#include "ui/compositor/compositor.h"
-#include "ui/compositor/compositor_observer.h"
-
-namespace cc {
-struct BeginFrameArgs;
-}
-
-namespace content {
-
-// This is the interface from the BeginFrameObserverProxy which manages sending
-// BeginFrame messages.
-class BeginFrameObserverProxyClient {
- public:
-  virtual void SendBeginFrame(const cc::BeginFrameArgs& args) = 0;
-};
-
-// This class is used to manage all of the RenderWidgetHostView state and
-// functionality that is associated with BeginFrame message handling.
-class CONTENT_EXPORT BeginFrameObserverProxy
-    : public ui::CompositorBeginFrameObserver,
-      public ui::CompositorObserver {
- public:
-  explicit BeginFrameObserverProxy(BeginFrameObserverProxyClient* client);
-  ~BeginFrameObserverProxy() override;
-
-  void SetNeedsBeginFrames(bool needs_begin_frames);
-
-  void SetCompositor(ui::Compositor* compositor);
-  void ResetCompositor();
-
-  // Overridden from ui::CompositorBeginFrameObserver:
-  void OnSendBeginFrame(const cc::BeginFrameArgs& args) override;
-
-  // Overridden from ui::CompositorObserver:
-  // TODO(simonhong): Stop overriding ui::CompositorObserver. We need to make
-  // sure that this class should be destroyed before ui::Compositor.
-  void OnCompositingDidCommit(ui::Compositor* compositor) override {}
-  void OnCompositingStarted(ui::Compositor* compositor,
-                            base::TimeTicks start_time) override {}
-  void OnCompositingEnded(ui::Compositor* compositor) override {}
-  void OnCompositingAborted(ui::Compositor* compositor) override {}
-  void OnCompositingLockStateChanged(ui::Compositor* compositor) override {}
-  void OnCompositingShuttingDown(ui::Compositor* compositor) override;
-
- private:
-  void StartObservingBeginFrames();
-  void StopObservingBeginFrames();
-
-  // True when RenderWidget needs a BeginFrame message.
-  bool needs_begin_frames_;
-
-  // Used whether to send begin frame to client or not. When |args| from
-  // Compositor is different from this, send to client.
-  cc::BeginFrameArgs last_sent_begin_frame_args_;
-
-  BeginFrameObserverProxyClient* client_;
-  ui::Compositor* compositor_;
-
-  DISALLOW_COPY_AND_ASSIGN(BeginFrameObserverProxy);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_BEGIN_FRAME_OBSERVER_PROXY_H_