gpu: reference target surfaces through a globally unique surface id.

content/renderer/gpu/gpu_channel_host.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_RENDERER_GPU_GPU_CHANNEL_HOST_H_
 #define CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 58 matching lines @@
   void set_gpu_info(const content::GPUInfo& gpu_info);
   const content::GPUInfo& gpu_info() const;
 
   void OnChannelError();
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // Create and connect to a command buffer in the GPU process.
   CommandBufferProxy* CreateViewCommandBuffer(
-      int render_view_id,
+      int32 surface_id,
       CommandBufferProxy* share_group,
       const std::string& allowed_extensions,
       const std::vector<int32>& attribs,
       const GURL& active_url,
       gfx::GpuPreference gpu_preference);
 
   // Create and connect to a command buffer in the GPU process.
   CommandBufferProxy* CreateOffscreenCommandBuffer(
       const gfx::Size& size,
       CommandBufferProxy* share_group,
@@ skipping 90 matching lines @@
   // for calls from contexts that may live on the compositor or main thread.
   mutable base::Lock context_lock_;
 
   // A filter for sending messages from thread other than the main thread.
   scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 #endif  // CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_