Add latency measurement system

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_
 
 #if defined(ENABLE_GPU)
 
 #include <map>
 #include <queue>
 #include <string>
 
 #include "gpu/ipc/command_buffer_proxy.h"
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "content/common/gpu/client/gpu_video_decode_accelerator_host.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/command_buffer_shared.h"
 #include "ipc/ipc_listener.h"
+#include "webkit/compositor_bindings/web_latency_info_impl.h"
 
 struct GPUCommandBufferConsoleMessage;
 
 namespace base {
 class SharedMemory;
 }
 
 namespace content {
 class GpuChannelHost;
 
 // Client side proxy that forwards messages synchronously to a
 // CommandBufferStub.
 class CommandBufferProxyImpl
     : public CommandBufferProxy,
       public IPC::Listener,
       public base::SupportsWeakPtr<CommandBufferProxyImpl> {
  public:
   typedef base::Callback<void(
       const std::string& msg, int id)> GpuConsoleMessageCallback;
+  typedef base::Callback<void(
+      const cc::LatencyInfo&)> GpuLatencyInfoCallback;
 
   CommandBufferProxyImpl(GpuChannelHost* channel, int route_id);
   virtual ~CommandBufferProxyImpl();
 
   // Sends an IPC message to create a GpuVideoDecodeAccelerator. Creates and
   // returns a pointer to a GpuVideoDecodeAcceleratorHost.
   // Returns NULL on failure to create the GpuVideoDecodeAcceleratorHost.
   // Note that the GpuVideoDecodeAccelerator may still fail to be created in
   // the GPU process, even if this returns non-NULL. In this case the client is
   // notified of an error later.
@@ skipping 57 matching lines @@
   // handled only on the GPU process' IO thread, and so is not effectively
   // a finish.
   bool GenerateMailboxNames(unsigned num, std::vector<std::string>* names);
 
   // Sends an IPC message with the new state of surface visibility.
   bool SetSurfaceVisible(bool visible);
 
   void SetOnConsoleMessageCallback(
       const GpuConsoleMessageCallback& callback);
 
+  void SetLatencyInfo(const cc::LatencyInfo& latency_info);
+
+  void SetLatencyInfoCallback(const GpuLatencyInfoCallback& 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.
   virtual gpu::error::Error GetLastError() OVERRIDE;
 
   void SendManagedMemoryStats(const GpuManagedMemoryStats& stats);
 
   GpuChannelHost* channel() const { return channel_; }
 
  private:
   typedef std::map<int32, gpu::Buffer> TransferBufferMap;
   typedef std::map<int, base::WeakPtr<GpuVideoDecodeAcceleratorHost> > Decoders;
   typedef base::hash_map<uint32, base::Closure> SignalTaskMap;
 
   // Send an IPC message over the GPU channel. This is private to fully
   // encapsulate the channel; all callers of this function must explicitly
   // 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 OnEchoAck();
   void OnConsoleMessage(const GPUCommandBufferConsoleMessage& message);
   void OnSetMemoryAllocation(const GpuMemoryAllocationForRenderer& allocation);
   void OnSignalSyncPointAck(uint32 id);
   void OnGenerateMailboxNamesReply(const std::vector<std::string>& names);
+  void OnSetLatencyInfo(const cc::LatencyInfo& latency_info);
 
   // 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 {
     return reinterpret_cast<gpu::CommandBufferSharedState*>(
         shared_state_shm_->memory());
   }
 
@@ skipping 20 matching lines @@
   // Tasks to be invoked in echo responses.
   std::queue<base::Closure> echo_tasks_;
 
   base::Closure channel_error_callback_;
 
   base::Callback<void(const GpuMemoryAllocationForRenderer&)>
       memory_allocation_changed_callback_;
 
   GpuConsoleMessageCallback console_message_callback_;
 
+  GpuLatencyInfoCallback latency_info_callback_;
+
   // Tasks to be invoked in SignalSyncPoint responses.
   uint32 next_signal_id_;
   SignalTaskMap signal_tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxyImpl);
 };
 
 }  // namespace content
 
 #endif  // ENABLE_GPU
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_