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

ppapi/proxy/ppb_audio_config_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_audio_config_proxy.h"
 
 #include "ppapi/c/dev/ppb_audio_config_dev.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 89 matching lines @@
 }
 
 const void* PPB_AudioConfig_Proxy::GetSourceInterface() const {
   return &audio_config_interface;
 }
 
 InterfaceID PPB_AudioConfig_Proxy::GetInterfaceId() const {
   return INTERFACE_ID_PPB_AUDIO_CONFIG;
 }
 
-void PPB_AudioConfig_Proxy::OnMessageReceived(const IPC::Message& msg) {
+bool PPB_AudioConfig_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_AudioConfig_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBAudioConfig_Create,
                         OnMsgCreateStereo16Bit)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBAudioConfig_RecommendSampleFrameCount,
                         OnMsgRecommendSampleFrameCount)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+  return handled;
 }
 
 void PPB_AudioConfig_Proxy::OnMsgCreateStereo16Bit(PP_Module module,
                                                    int32_t sample_rate,
                                                    uint32_t sample_frame_count,
                                                    PP_Resource* result) {
   *result = ppb_audio_config_target()->CreateStereo16Bit(
       module, static_cast<PP_AudioSampleRate_Dev>(sample_rate),
       sample_frame_count);
 }
 
 void PPB_AudioConfig_Proxy::OnMsgRecommendSampleFrameCount(
     uint32_t requested,
     uint32_t* result) {
   *result = ppb_audio_config_target()->RecommendSampleFrameCount(requested);
 }
 
 }  // namespace proxy
 }  // namespace pp