Add support to delay sending SwapbufferAck as needed.

content/common/gpu/image_transport_surface.h

 // Copyright (c) 2012 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_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 #define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 108 matching lines @@
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // Helper send functions. Caller fills in the surface specific params
   // like size and surface id. The helper fills in the rest.
   void SendAcceleratedSurfaceBuffersSwapped(
       GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params);
   void SendUpdateVSyncParameters(
       base::TimeTicks timebase, base::TimeDelta interval);
 
-  void SwapBuffersCompleted(const std::vector<ui::LatencyInfo>& latency_info);
+  void SwapBuffersCallBack();
 
   void SetPreemptByFlag(
       scoped_refptr<gpu::PreemptionFlag> preemption_flag);
 
   // Make the surface's context current.
   bool MakeCurrent();
 
+  void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
+
   // Set the default swap interval on the surface.
   static void SetSwapInterval(gfx::GLContext* context);
 
   GpuChannelManager* manager() const { return manager_; }
   GpuCommandBufferStub* stub() const { return stub_.get(); }
 
  private:
   gpu::gles2::GLES2Decoder* Decoder();
 
   // IPC::Message handlers.
 #if defined(OS_MACOSX)
   void OnBufferPresented(
       const AcceleratedSurfaceMsg_BufferPresented_Params& params);
 #endif
   void OnWakeUpGpu();
 
   // Backbuffer resize callback.
   void Resize(gfx::Size size, float scale_factor);
 
-  void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
-
   // Weak pointers that point to objects that outlive this helper.
   ImageTransportSurface* surface_;
   GpuChannelManager* manager_;
 
   base::WeakPtr<GpuCommandBufferStub> stub_;
+  std::vector<ui::LatencyInfo> latency_info_;
   int32 route_id_;
   gfx::PluginWindowHandle handle_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageTransportHelper);
 };
 
 // An implementation of ImageTransportSurface that implements GLSurface through
 // GLSurfaceAdapter, thereby forwarding GLSurface methods through to it.
 class PassThroughImageTransportSurface
     : public gfx::GLSurfaceAdapter,
@@ skipping 26 matching lines @@
 
   // If updated vsync parameters can be determined, send this information to
   // the browser.
   virtual void SendVSyncUpdateIfAvailable();
 
   ImageTransportHelper* GetHelper() { return helper_.get(); }
 
  private:
   scoped_ptr<ImageTransportHelper> helper_;
   bool did_set_swap_interval_;
-  std::vector<ui::LatencyInfo> latency_info_;
 
   DISALLOW_COPY_AND_ASSIGN(PassThroughImageTransportSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_