Change over IgnoreReturn to IgnoreResult. remove IgnoreReturn.

content/renderer/media/audio_message_filter.cc

 // Copyright (c) 2011 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 "content/renderer/media/audio_message_filter.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/time.h"
 #include "content/common/child_process.h"
@@ skipping 13 matching lines @@
   if (!channel_) {
     delete message;
     return false;
   }
 
   if (MessageLoop::current() != ChildProcess::current()->io_message_loop()) {
     // Can only access the IPC::Channel on the IPC thread since it's not thread
     // safe.
     ChildProcess::current()->io_message_loop()->PostTask(
         FROM_HERE,
-        base::IgnoreReturn<bool>(base::Bind(&AudioMessageFilter::Send,
-                                            this, message)));
+        base::Bind(base::IgnoreResult(&AudioMessageFilter::Send), this,
+                   message));
     return true;
   }
 
   return channel_->Send(message);
 }
 
 bool AudioMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AudioMessageFilter, message)
     IPC_MESSAGE_HANDLER(AudioMsg_RequestPacket, OnRequestPacket)
@@ skipping 89 matching lines @@
   delegate->OnVolume(volume);
 }
 
 int32 AudioMessageFilter::AddDelegate(Delegate* delegate) {
   return delegates_.Add(delegate);
 }
 
 void AudioMessageFilter::RemoveDelegate(int32 id) {
   delegates_.Remove(id);
 }