Hook up ui::Compositor to Display's BeginFrameSource

cc/surfaces/display.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 CC_SURFACES_DISPLAY_H_
 #define CC_SURFACES_DISPLAY_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 57 matching lines @@
   void SetExternalClip(const gfx::Rect& clip);
 
   SurfaceId CurrentSurfaceId();
 
   // DisplaySchedulerClient implementation.
   bool DrawAndSwap() override;
 
   // OutputSurfaceClient implementation.
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
+  void SetBeginFrameSource(BeginFrameSource* source) override;
   void SetNeedsRedrawRect(const gfx::Rect& damage_rect) override;
   void DidSwapBuffers() override;
   void DidSwapBuffersComplete() override;
   void ReclaimResources(const CompositorFrameAck* ack) override;
   void DidLoseOutputSurface() override;
   void SetExternalTilePriorityConstraints(
       const gfx::Rect& viewport_rect,
       const gfx::Transform& transform) override;
   void SetMemoryPolicy(const ManagedMemoryPolicy& policy) override;
   void SetTreeActivationCallback(const base::Closure& callback) override;
@@ skipping 29 matching lines @@
   scoped_ptr<DirectRenderer> renderer_;
   scoped_ptr<TextureMailboxDeleter> texture_mailbox_deleter_;
   std::vector<ui::LatencyInfo> stored_latency_info_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_DISPLAY_H_