Make IPC::Channel::Listener:OnMessageReceived have a return value indicating ...

chrome/renderer/gpu_channel_host.cc

Index: chrome/renderer/gpu_channel_host.cc
===================================================================
--- chrome/renderer/gpu_channel_host.cc	(revision 70108)
+++ chrome/renderer/gpu_channel_host.cc	(working copy)
@@ -37,14 +37,14 @@
   return gpu_info_;
 }
 
-void GpuChannelHost::OnMessageReceived(const IPC::Message& message) {
+bool GpuChannelHost::OnMessageReceived(const IPC::Message& message) {
   DCHECK(message.routing_id() != MSG_ROUTING_CONTROL);
 
   // The object to which the message is addressed might have been destroyed.
   // This is expected, for example an asynchronous SwapBuffers notification
   // to a command buffer proxy that has since been destroyed. This function
   // fails silently in that case.
-  router_.RouteMessage(message);
+  return router_.RouteMessage(message);
 }
 
 void GpuChannelHost::OnChannelConnected(int32 peer_pid) {