Route IPC through browser when creating a viewable command buffer.

chrome/gpu/gpu_thread.cc

Index: chrome/gpu/gpu_thread.cc
diff --git a/chrome/gpu/gpu_thread.cc b/chrome/gpu/gpu_thread.cc
index 6e9b3daff9a703c8ddc7e60e455bfb08aaa1e932..13d1ec1b9568f9e0110f0a9786995f81038ce46c 100644
--- a/chrome/gpu/gpu_thread.cc
+++ b/chrome/gpu/gpu_thread.cc
@@ -69,6 +69,8 @@ bool GpuThread::OnControlMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(GpuMsg_Initialize, OnInitialize)
     IPC_MESSAGE_HANDLER(GpuMsg_EstablishChannel, OnEstablishChannel)
     IPC_MESSAGE_HANDLER(GpuMsg_CloseChannel, OnCloseChannel)
+    IPC_MESSAGE_HANDLER(GpuMsg_CreateViewCommandBuffer,
+                        OnCreateViewCommandBuffer);
     IPC_MESSAGE_HANDLER(GpuMsg_Synchronize, OnSynchronize)
     IPC_MESSAGE_HANDLER(GpuMsg_CollectGraphicsInfo, OnCollectGraphicsInfo)
 #if defined(OS_MACOSX)
@@ -208,6 +210,22 @@ void GpuThread::OnSynchronize() {
   Send(new GpuHostMsg_SynchronizeReply());
 }
 
+void GpuThread::OnCreateViewCommandBuffer(
+    gfx::PluginWindowHandle window,
+    int32 render_view_id,
+    int32 renderer_id,
+    const GPUCreateCommandBufferConfig& init_params) {
+  int32 route_id = MSG_ROUTING_NONE;
+
+  GpuChannelMap::const_iterator iter = gpu_channels_.find(renderer_id);
+  if (iter != gpu_channels_.end()) {
+    iter->second->CreateViewCommandBuffer(
+        window, render_view_id, init_params, &route_id);
+  }
+
+  Send(new GpuHostMsg_CommandBufferCreated(route_id));
+}
+
 void GpuThread::OnCollectGraphicsInfo() {
   Send(new GpuHostMsg_GraphicsInfoCollected(gpu_info_));
 }