Hook up ui::Compositor to Display's BeginFrameSource

components/mus/surfaces/top_level_display_client.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 COMPONENTS_MUS_SURFACES_DISPLAY_IMPL_H_
 #define COMPONENTS_MUS_SURFACES_DISPLAY_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 40 matching lines @@
 
   void RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> output_request);
 
  private:
   // DisplayClient implementation.
   // TODO(rjkroege, fsamuel): This won't work correctly with multiple displays.
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
   void OutputSurfaceLost() override;
   void SetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override;
+  cc::BeginFrameSource* BeginFrameSourceForChildren() override;
 
   // SurfacesContextProviderDelegate:
   void OnVSyncParametersUpdated(int64_t timebase, int64_t interval) override;
 
   // SurfaceFactoryClient implementation.
   void ReturnResources(const cc::ReturnedResourceArray& resources) override;
   void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   scoped_refptr<SurfacesState> surfaces_state_;
   cc::SurfaceFactory factory_;
   cc::SurfaceId cc_id_;
 
   gfx::Size last_submitted_frame_size_;
   scoped_ptr<cc::CompositorFrame> pending_frame_;
 
   scoped_ptr<cc::SyntheticBeginFrameSource> synthetic_frame_source_;
   scoped_ptr<cc::DisplayScheduler> scheduler_;
   scoped_ptr<cc::Display> display_;
 
   DISALLOW_COPY_AND_ASSIGN(TopLevelDisplayClient);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_SURFACES_DISPLAY_IMPL_H_