Changed GpuVSyncProvider to implement gfx::VSyncProvider

gpu/ipc/service/gpu_command_buffer_stub.h

Index: gpu/ipc/service/gpu_command_buffer_stub.h
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.h b/gpu/ipc/service/gpu_command_buffer_stub.h
index 91b8dfe1c36ff3978808b7af5933d2ee276e8c31..ff834de49cfdde9e9357efc3f13b99f72d3b6288 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.h
+++ b/gpu/ipc/service/gpu_command_buffer_stub.h
@@ -96,6 +96,9 @@ class GPU_EXPORT GpuCommandBufferStub
   void UpdateVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
 
+  void AddFilter(IPC::MessageFilter* message_filter) override;
+  int32_t GetRouteID() const override;
+
   gles2::MemoryTracker* GetMemoryTracker() const;
 
   // Whether this command buffer can currently handle IPC messages.
@@ -111,10 +114,6 @@ class GPU_EXPORT GpuCommandBufferStub
   // Unique command buffer ID for this command buffer stub.
   CommandBufferId command_buffer_id() const { return command_buffer_id_; }
 
-  // Identifies the various GpuCommandBufferStubs in the GPU process belonging
-  // to the same renderer process.
-  int32_t route_id() const { return route_id_; }
-
   // Identifies the stream for this command buffer.
   int32_t stream_id() const { return stream_id_; }