Remove the AudioManager singleton.

media/audio/android/audio_manager_android.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 "media/audio/android/audio_manager_android.h"
 
 #include "base/logging.h"
 #include "media/audio/android/audio_track_output_android.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
 
-// static
-AudioManager* AudioManager::CreateAudioManager() {
+AudioManager* CreateAudioManager() {
   return new AudioManagerAndroid();
 }
 
 AudioManagerAndroid::AudioManagerAndroid() {}
 
 AudioManagerAndroid::~AudioManagerAndroid() {
   audio_thread_.Stop();
 }
 
 bool AudioManagerAndroid::HasAudioOutputDevices() {
@@ skipping 23 matching lines @@
   return FakeAudioInputStream::MakeFakeStream(params);
 }
 
 void AudioManagerAndroid::MuteAll() {
   NOTIMPLEMENTED();
 }
 
 void AudioManagerAndroid::UnMuteAll() {
   NOTIMPLEMENTED();
 }