Remove the AudioManager singleton.

media/audio/openbsd/audio_manager_openbsd.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/openbsd/audio_manager_openbsd.h"
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
 #include "media/audio/audio_output_dispatcher.h"
 #include "media/audio/fake_audio_input_stream.h"
@@ skipping 100 matching lines @@
 }
 
 void AudioManagerOpenBSD::ReleaseOutputStream(AudioOutputStream* stream) {
   if (stream) {
     active_streams_.erase(stream);
     delete stream;
   }
 }
 
 // static
-AudioManager* AudioManager::CreateAudioManager() {
+AudioManager* CreateAudioManager() {
   return new AudioManagerOpenBSD();
 }