Allow cmdbuffer creation from compositor thread.

content/renderer/gpu/command_buffer_proxy.cc

Index: content/renderer/gpu/command_buffer_proxy.cc
diff --git a/content/renderer/gpu/command_buffer_proxy.cc b/content/renderer/gpu/command_buffer_proxy.cc
index 8d11738c61146e03b90d611c6374411a7f8ae4cf..f0499a70c728868838b172cb1863ca2c504fc682 100644
--- a/content/renderer/gpu/command_buffer_proxy.cc
+++ b/content/renderer/gpu/command_buffer_proxy.cc
@@ -40,6 +40,9 @@ CommandBufferProxy::~CommandBufferProxy() {
 }
 
 bool CommandBufferProxy::OnMessageReceived(const IPC::Message& message) {
+  if (IsOrphaned())

[nduca, 2011/08/15 22:28:36]

How about doing this in the MessageFilter side before calling OnMessageRecieved
on the listener? That would reduce fragility...

+    return false;
+
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(CommandBufferProxy, message)
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_UpdateState, OnUpdateState);