Make BrowserMessageFilter support dispatching messages on different threads.

chrome/browser/renderer_host/audio_renderer_host.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 "chrome/browser/renderer_host/audio_renderer_host.h"
 
 #include "base/metrics/histogram.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "chrome/browser/renderer_host/audio_sync_reader.h"
@@ skipping 38 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////
 // AudioRendererHost implementations.
 AudioRendererHost::AudioRendererHost() {
 }
 
 AudioRendererHost::~AudioRendererHost() {
   DCHECK(audio_entries_.empty());
 }
 
 void AudioRendererHost::OnChannelClosing() {
-  BrowserIOMessageFilter::OnChannelClosing();
+  BrowserMessageFilter::OnChannelClosing();
 
   // Since the IPC channel is gone, close all requested audio streams.
   DeleteEntries();
 }
 
 void AudioRendererHost::OnDestruct() const {
   BrowserThread::DeleteOnIOThread::Destruct(this);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 156 matching lines @@
 
   AudioEntry* entry = LookupByController(controller);
   if (!entry)
     return;
 
   DeleteEntryOnError(entry);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // IPC Messages handler
-bool AudioRendererHost::OnMessageReceived(const IPC::Message& message) {
+bool AudioRendererHost::OnMessageReceived(const IPC::Message& message,
+                                          bool* message_was_ok) {
   bool handled = true;
-  bool message_was_ok = true;
-  IPC_BEGIN_MESSAGE_MAP_EX(AudioRendererHost, message, message_was_ok)
+  IPC_BEGIN_MESSAGE_MAP_EX(AudioRendererHost, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(ViewHostMsg_CreateAudioStream, OnCreateStream)
     IPC_MESSAGE_HANDLER(ViewHostMsg_PlayAudioStream, OnPlayStream)
     IPC_MESSAGE_HANDLER(ViewHostMsg_PauseAudioStream, OnPauseStream)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FlushAudioStream, OnFlushStream)
     IPC_MESSAGE_HANDLER(ViewHostMsg_CloseAudioStream, OnCloseStream)
     IPC_MESSAGE_HANDLER(ViewHostMsg_NotifyAudioPacketReady, OnNotifyPacketReady)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetAudioVolume, OnGetVolume)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetAudioVolume, OnSetVolume)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
 
-  if (!message_was_ok)
-    BadMessageReceived(message.type());
-
   return handled;
 }
 
 void AudioRendererHost::OnCreateStream(
     const IPC::Message& msg, int stream_id,
     const ViewHostMsg_Audio_CreateStream_Params& params, bool low_latency) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(LookupById(msg.routing_id(), stream_id) == NULL);
 
   AudioParameters audio_params(params.params);
@@ skipping 209 matching lines @@
 
   // Iterate the map of entries.
   // TODO(hclam): Implement a faster look up method.
   for (AudioEntryMap::iterator i = audio_entries_.begin();
        i != audio_entries_.end(); ++i) {
     if (controller == i->second->controller.get())
       return i->second;
   }
   return NULL;
 }