Remove some content_child dependency from content_common

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 26 matching lines @@
 }
 }
 
 namespace IPC {
 struct ChannelHandle;
 }
 
 struct GPUCreateCommandBufferConfig;
 
 namespace content {
-class ChildThread;
 class GpuChannel;
 class GpuWatchdog;
+class MessageRouter;
 class SyncPointManager;
 
 // A GpuChannelManager is a thread responsible for issuing rendering commands
 // managing the lifetimes of GPU channels and forwarding IPC requests from the
 // browser process to them based on the corresponding renderer ID.
-//
-// A GpuChannelManager can also be hosted in the browser process in single
-// process or in-process GPU modes. In this case there is no corresponding
-// GpuChildThread and this is the reason the GpuChildThread is referenced via
-// a pointer to IPC::Sender, which can be implemented by other hosts to send
-// IPC messages to the browser process IO thread on the GpuChannelManager's
-// behalf.
 class GpuChannelManager : public IPC::Listener,
                           public IPC::Sender {
  public:
-  GpuChannelManager(ChildThread* gpu_child_thread,
+  GpuChannelManager(MessageRouter* router,
                     GpuWatchdog* watchdog,
                     base::MessageLoopProxy* io_message_loop,
                     base::WaitableEvent* shutdown_event);
   virtual ~GpuChannelManager();
 
   // Remove the channel for a particular renderer.
   void RemoveChannel(int client_id);
 
   // Listener overrides.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
@@ skipping 55 matching lines @@
   void OnDeleteImage(int32 client_id, int32 image_id, int32 sync_point);
   void OnDeleteImageSyncPointRetired(ImageOperation*);
   void OnLoadedShader(std::string shader);
 
   void OnLoseAllContexts();
 
   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
   base::WaitableEvent* shutdown_event_;
 
   // Used to send and receive IPC messages from the browser process.
-  ChildThread* gpu_child_thread_;
+  MessageRouter* const router_;
 
   // These objects manage channels to individual renderer processes there is
   // one channel for each renderer process that has connected to this GPU
   // process.
   GpuChannelMap gpu_channels_;
   scoped_refptr<gfx::GLShareGroup> share_group_;
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
   GpuMemoryManager gpu_memory_manager_;
   GpuEventsDispatcher gpu_devtools_events_dispatcher_;
   GpuWatchdog* watchdog_;
   scoped_refptr<SyncPointManager> sync_point_manager_;
   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_