Support multiple HW video decoders per context.

content/common/gpu/gpu_channel.h

 // Copyright (c) 2011 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_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #pragma once
 
 #include <queue>
 #include <set>
@@ skipping 104 matching lines @@
   // Look up a GLSurface by ID. In this case the ID is the IPC routing ID.
   virtual gfx::GLSurface* LookupSurface(int surface_id);
 
   // Get the TransportTexture by ID.
   TransportTexture* GetTransportTexture(int32 route_id);
 
   // Destroy the TransportTexture by ID. This method is only called by
   // TransportTexture to delete and detach itself.
   void DestroyTransportTexture(int32 route_id);
 
+  // Generate a route ID guaranteed to be unique for this channel.
+  int GenerateRouteID();
+
+  // Called to add/remove a listener for a particular message routing ID.
+  void AddRoute(int32 route_id, IPC::Channel::Listener* listener);
+  void RemoveRoute(int32 route_id);
+
  private:
   void OnDestroy();
 
   bool OnControlMessageReceived(const IPC::Message& msg);
 
   void HandleDeferredMessages();
 
-  int GenerateRouteID();
-
   // Message handlers.
   void OnInitialize(base::ProcessHandle renderer_process);
   void OnCreateOffscreenCommandBuffer(
       const gfx::Size& size,
       const GPUCreateCommandBufferConfig& init_params,
       IPC::Message* reply_message);
   void OnDestroyCommandBuffer(int32 route_id, IPC::Message* reply_message);
 
   void OnCreateOffscreenSurface(const gfx::Size& size,
                                 IPC::Message* reply_message);
@@ skipping 42 matching lines @@
   gpu::gles2::DisallowedExtensions disallowed_extensions_;
   GpuWatchdog* watchdog_;
   bool software_;
 
   ScopedRunnableMethodFactory<GpuChannel> task_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_