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

ppapi/proxy/ppb_fullscreen_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_fullscreen_proxy.h"
 
 #include "ppapi/c/dev/ppb_fullscreen_dev.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
@@ skipping 32 matching lines @@
 }
 
 const void* PPB_Fullscreen_Proxy::GetSourceInterface() const {
   return &ppb_fullscreen;
 }
 
 InterfaceID PPB_Fullscreen_Proxy::GetInterfaceId() const {
   return INTERFACE_ID_PPB_FULLSCREEN;
 }
 
-void PPB_Fullscreen_Proxy::OnMessageReceived(const IPC::Message& msg) {
+bool PPB_Fullscreen_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Fullscreen_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFullscreen_IsFullscreen,
                         OnMsgIsFullscreen)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFullscreen_SetFullscreen,
                         OnMsgSetFullscreen)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   // TODO(brettw): handle bad messages!
+  return handled;
 }
 
 void PPB_Fullscreen_Proxy::OnMsgIsFullscreen(PP_Instance instance,
                                              PP_Bool* result) {
   *result = ppb_fullscreen_target()->IsFullscreen(instance);
 }
 
 void PPB_Fullscreen_Proxy::OnMsgSetFullscreen(PP_Instance instance,
                                               PP_Bool fullscreen,
                                               PP_Bool* result) {
   *result = ppb_fullscreen_target()->SetFullscreen(instance, fullscreen);
 }
 
 }  // namespace proxy
 }  // namespace pp