Added volume adjust sound behind the flag.

media/audio/sounds/sounds_manager.cc

 // Copyright 2013 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 "media/audio/sounds/sounds_manager.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
@@ skipping 55 matching lines @@
   }
   return handlers_[key]->Play();
 }
 
 base::TimeDelta SoundsManagerImpl::GetDuration(SoundKey key) {
   DCHECK(CalledOnValidThread());
   if (handlers_.find(key) == handlers_.end() ||
       !handlers_[key]->IsInitialized()) {
     return base::TimeDelta();
   }
-  const WavAudioHandler& wav_audio = handlers_[key]->wav_audio_handler();
-  const int64 size = wav_audio.size();
-  const int64 rate = wav_audio.byte_rate();
-  return base::TimeDelta::FromMicroseconds(size * 1000000 / rate);
+  const WavParser& wav_parser = handlers_[key]->wav_parser();
+  return wav_parser.duration();
 }
 
 // SoundsManagerStub ---------------------------------------------------
 
 class SoundsManagerStub : public SoundsManager {
  public:
   SoundsManagerStub();
   virtual ~SoundsManagerStub();
 
   // SoundsManager implementation:
@@ skipping 51 matching lines @@
   g_instance = NULL;
 }
 
 // static
 SoundsManager* SoundsManager::Get() {
   CHECK(g_instance) << "SoundsManager::Get() is called before Create()";
   return g_instance;
 }
 
 }  // namespace media