gpu: Implement idle async pixel transfers.

content/common/gpu/gpu_channel_manager.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_GPU_CHANNEL_MANAGER_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_MANAGER_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 58 matching lines @@
 
   // Remove the channel for a particular renderer.
   void RemoveChannel(int client_id);
 
   // Listener overrides.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // Sender overrides.
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
+  bool HandleMessagesScheduled();
+  uint64 MessagesProcessed();
+
   void LoseAllContexts();
 
   base::WeakPtrFactory<GpuChannelManager> weak_factory_;
 
   int GenerateRouteID();
   void AddRoute(int32 routing_id, IPC::Listener* listener);
   void RemoveRoute(int32 routing_id);
 
   gpu::gles2::ProgramCache* program_cache();
 
@@ skipping 55 matching lines @@
   scoped_ptr<gpu::gles2::ProgramCache> program_cache_;
   scoped_refptr<gfx::GLSurface> default_offscreen_surface_;
   ImageOperationQueue image_operations_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_MANAGER_H_