cc: Remove retro frames from scheduler.

content/renderer/gpu/compositor_external_begin_frame_source.h

 // Copyright 2014 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_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 13 matching lines @@
     : public cc::BeginFrameSourceBase,
       public NON_EXPORTED_BASE(base::NonThreadSafe) {
  public:
   explicit CompositorExternalBeginFrameSource(
       CompositorForwardingMessageFilter* filter,
       IPC::SyncMessageFilter* sync_message_filter,
       int routing_id);
   ~CompositorExternalBeginFrameSource() override;
 
   // cc::BeginFrameSourceBase implementation.
+  void DidFinishFrame(cc::BeginFrameObserver* obs) override;
   void AddObserver(cc::BeginFrameObserver* obs) override;
   void OnNeedsBeginFramesChanged(bool needs_begin_frames) override;
 
  private:
   class CompositorExternalBeginFrameSourceProxy
       : public base::RefCountedThreadSafe<
                    CompositorExternalBeginFrameSourceProxy> {
    public:
     explicit CompositorExternalBeginFrameSourceProxy(
         CompositorExternalBeginFrameSource* begin_frame_source)
@@ skipping 27 matching lines @@
   int routing_id_;
   CompositorForwardingMessageFilter::Handler begin_frame_source_filter_handler_;
   cc::BeginFrameArgs missed_begin_frame_args_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorExternalBeginFrameSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_