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

ppapi/proxy/ppb_image_data_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_image_data_proxy.h"
 
 #include <string.h>  // For memcpy
 
 #include <vector>
 
@@ skipping 101 matching lines @@
 }
 
 const void* PPB_ImageData_Proxy::GetSourceInterface() const {
   return &ppb_imagedata;
 }
 
 InterfaceID PPB_ImageData_Proxy::GetInterfaceId() const {
   return INTERFACE_ID_PPB_IMAGE_DATA;
 }
 
-void PPB_ImageData_Proxy::OnMessageReceived(const IPC::Message& msg) {
+bool PPB_ImageData_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPB_ImageData_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBImageData_GetNativeImageDataFormat,
                         OnMsgGetNativeImageDataFormat)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBImageData_IsImageDataFormatSupported,
                         OnMsgIsImageDataFormatSupported)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBImageData_Create, OnMsgCreate)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   // FIXME(brettw) handle bad messages!
+  return handled;
 }
 
 void PPB_ImageData_Proxy::OnMsgGetNativeImageDataFormat(int32* result) {
   *result = ppb_image_data_target()->GetNativeImageDataFormat();
 }
 
 void PPB_ImageData_Proxy::OnMsgIsImageDataFormatSupported(int32 format,
                                                           PP_Bool* result) {
   *result = ppb_image_data_target()->IsImageDataFormatSupported(
       static_cast<PP_ImageDataFormat>(format));
@@ skipping 25 matching lines @@
     if (trusted) {
       int32_t handle;
       if (trusted->GetSharedMemory(*result, &handle, &byte_count) == PP_OK)
           *result_image_handle = ImageData::HandleFromInt(handle);
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace pp