Revert of Enable the volume slider in Ash for windows.

media/audio/win/core_audio_util_win.h

 // 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.
 
 // Utility methods for the Core Audio API on Windows.
 // Always ensure that Core Audio is supported before using these methods.
-// Use media::CoreAudioUtil::IsSupported() for this purpose.
+// Use media::CoreAudioIsSupported() for this purpose.
 // Also, all methods must be called on a valid COM thread. This can be done
 // by using the base::win::ScopedCOMInitializer helper class.
 
 #ifndef MEDIA_AUDIO_WIN_CORE_AUDIO_UTIL_WIN_H_
 #define MEDIA_AUDIO_WIN_CORE_AUDIO_UTIL_WIN_H_
 
 #include <audioclient.h>
 #include <mmdeviceapi.h>
 #include <string>
 
@@ skipping 208 matching lines @@
 
  private:
   CoreAudioUtil() {}
   ~CoreAudioUtil() {}
   DISALLOW_COPY_AND_ASSIGN(CoreAudioUtil);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_WIN_CORE_AUDIO_UTIL_WIN_H_