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

content/renderer/gpu/gpu_channel_host.cc

 // 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.
 
 #include "content/renderer/gpu/gpu_channel_host.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "content/common/child_process.h"
@@ skipping 164 matching lines @@
     return sync_filter_->Send(message);
   }
 
   // Callee takes ownership of message, regardless of whether Send is
   // successful. See IPC::Message::Sender.
   delete message;
   return false;
 }
 
 CommandBufferProxy* GpuChannelHost::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) {
   DCHECK(ChildThread::current());
 #if defined(ENABLE_GPU)
   AutoLock lock(context_lock_);
   // An error occurred. Need to get the host again to reinitialize it.
   if (!channel_.get())
     return NULL;
 
   GPUCreateCommandBufferConfig init_params;
   init_params.share_group_id =
       share_group ? share_group->route_id() : MSG_ROUTING_NONE;
   init_params.allowed_extensions = allowed_extensions;
   init_params.attribs = attribs;
   init_params.active_url = active_url;
   init_params.gpu_preference = gpu_preference;
   int32 route_id;
   if (!ChildThread::current()->Send(
       new GpuHostMsg_CreateViewCommandBuffer(
-          render_view_id,
+          surface_id,
           init_params,
           &route_id))) {
     return NULL;
   }
 
   if (route_id == MSG_ROUTING_NONE)
     return NULL;
 
   CommandBufferProxy* command_buffer = new CommandBufferProxy(this, route_id);
   AddRoute(route_id, command_buffer->AsWeakPtr());
@@ skipping 94 matching lines @@
                                                  &result))) {
     return false;
   }
   return result;
 }
 
 void GpuChannelHost::ForciblyCloseChannel() {
   Send(new GpuChannelMsg_CloseChannel());
   SetStateLost();
 }