Ozone: Avoid blocking in Swapbuffer Call.

content/common/gpu/client/command_buffer_proxy_impl.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_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 120 matching lines @@
 
   void SetOnConsoleMessageCallback(
       const GpuConsoleMessageCallback& callback);
 
   void SetLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
   typedef base::Callback<void(const std::vector<ui::LatencyInfo>& latency_info)>
       SwapBuffersCompletionCallback;
   void SetSwapBuffersCompletionCallback(
       const SwapBuffersCompletionCallback& callback);
 
+  typedef base::Callback<void()>
+      PageFlipCompletionCallback;
+  void SetPageFlipCompletionCallback(
+      const PageFlipCompletionCallback& callback);
+
   // TODO(apatrick): this is a temporary optimization while skia is calling
   // ContentGLContext::MakeCurrent prior to every GL call. It saves returning 6
   // ints redundantly when only the error is needed for the
   // CommandBufferProxyImpl implementation.
   gpu::error::Error GetLastError() override;
 
   GpuChannelHost* channel() const { return channel_; }
 
   base::SharedMemoryHandle GetSharedStateHandle() const {
     return shared_state_shm_->handle();
@@ skipping 10 matching lines @@
   // verify that the context has not been lost.
   bool Send(IPC::Message* msg);
 
   // Message handlers:
   void OnUpdateState(const gpu::CommandBuffer::State& state);
   void OnDestroyed(gpu::error::ContextLostReason reason);
   void OnConsoleMessage(const GPUCommandBufferConsoleMessage& message);
   void OnSetMemoryAllocation(const gpu::MemoryAllocation& allocation);
   void OnSignalSyncPointAck(uint32 id);
   void OnSwapBuffersCompleted(const std::vector<ui::LatencyInfo>& latency_info);
+  void OnPageFlipCompleted();
 
   // Try to read an updated copy of the state from shared memory.
   void TryUpdateState();
 
   // The shared memory area used to update state.
   gpu::CommandBufferSharedState* shared_state() const;
 
   // Unowned list of DeletionObservers.
   ObserverList<DeletionObserver> deletion_observers_;
 
@@ skipping 21 matching lines @@
   SignalTaskMap signal_tasks_;
 
   // Local cache of id to gpu memory buffer mapping.
   GpuMemoryBufferMap gpu_memory_buffers_;
 
   gpu::Capabilities capabilities_;
 
   std::vector<ui::LatencyInfo> latency_info_;
 
   SwapBuffersCompletionCallback swap_buffers_completion_callback_;
+  PageFlipCompletionCallback page_flip_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxyImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_