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

ppapi/proxy/ppb_buffer_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_buffer_proxy.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "build/build_config.h"
@@ skipping 113 matching lines @@
 }
 
 const void* PPB_Buffer_Proxy::GetSourceInterface() const {
   return &ppb_buffer;
 }
 
 InterfaceID PPB_Buffer_Proxy::GetInterfaceId() const {
   return INTERFACE_ID_PPB_BUFFER;
 }
 
-void PPB_Buffer_Proxy::OnMessageReceived(const IPC::Message& msg) {
+bool PPB_Buffer_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_Buffer_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBBuffer_Create, OnMsgCreate)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   // TODO(brettw) handle bad messages!
+  return handled;
 }
 
 void PPB_Buffer_Proxy::OnMsgCreate(PP_Module module,
                                    uint32_t size,
                                    PP_Resource* result_resource,
                                    int* result_shm_handle) {
   *result_resource = ppb_buffer_target()->Create(module, size);
   // TODO(brettw) set the shm handle from a trusted interface.
   *result_shm_handle = 0;
 }
 
 }  // namespace proxy
 }  // namespace pp