stopping the audio thread before destroying the AudioManager<Platform>

media/audio/mac/audio_manager_mac.cc

 // Copyright (c) 2012 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 <CoreAudio/AudioHardware.h>
 
 #include "base/mac/mac_logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
@@ skipping 203 matching lines @@
   // special hard limit only for Leopard.
   // See bug: http://crbug.com/30242
   // In OS other than OSX Leopard, the number of audio streams
   // allowed is a lot more.
   int max_output_stream = base::mac::IsOSLeopardOrEarlier() ?
       kMaxOutputStreamsLeopard : kMaxOutputStreams;
   SetMaxOutputStreamsAllowed(max_output_stream);
 }
 
 AudioManagerMac::~AudioManagerMac() {
+  Shutdown();
 }
 
 bool AudioManagerMac::HasAudioOutputDevices() {
   return HasAudioHardware(kAudioHardwarePropertyDefaultOutputDevice);
 }
 
 bool AudioManagerMac::HasAudioInputDevices() {
   return HasAudioHardware(kAudioHardwarePropertyDefaultInputDevice);
 }
 
@@ skipping 51 matching lines @@
   AudioInputStream* stream = NULL;
   if (audio_device_id != kAudioObjectUnknown)
     stream = new AUAudioInputStream(this, params, audio_device_id);
 
   return stream;
 }
 
 AudioManager* CreateAudioManager() {
   return new AudioManagerMac();
 }