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

ppapi/proxy/ppb_core_proxy.cc

 // Copyright (c) 2010 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 "ppapi/proxy/ppb_core_proxy.h"
 
 #include <stdlib.h>  // For malloc
 
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 78 matching lines @@
 }
 
 const void* PPB_Core_Proxy::GetSourceInterface() const {
   return &core_interface;
 }
 
 InterfaceID PPB_Core_Proxy::GetInterfaceId() const {
   return INTERFACE_ID_PPB_CORE;
 }
 
-void PPB_Core_Proxy::OnMessageReceived(const IPC::Message& msg) {
+bool PPB_Core_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Core_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBCore_AddRefResource,
                         OnMsgAddRefResource)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBCore_ReleaseResource,
                         OnMsgReleaseResource)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   // TODO(brettw) handle bad messages!
+  return handled;
 }
 
 void PPB_Core_Proxy::OnMsgAddRefResource(PP_Resource resource) {
   ppb_core_target()->AddRefResource(resource);
 }
 
 void PPB_Core_Proxy::OnMsgReleaseResource(PP_Resource resource) {
   ppb_core_target()->ReleaseResource(resource);
 }
 
 }  // namespace proxy
 }  // namespace pp