Continuation of CL 5685007, rename the singleton accessor method in more files.

chrome/browser/chromeos/audio_handler.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_AUDIO_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_AUDIO_HANDLER_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 namespace chromeos {
 
 class PulseAudioMixer;
 
 class AudioHandler {
  public:
-  static AudioHandler* instance();
+  static AudioHandler* GetInstance();
 
   // Get volume level in our internal 0-100% range, 0 being pure silence.
   // Volume may go above 100% if another process changes PulseAudio's volume.
   // Returns default of 0 on error.  This function will block until the volume
   // is retrieved or fails.  Blocking call.
   double GetVolumePercent();
 
   // Set volume level from 0-100%.  Volumes above 100% are OK and boost volume,
   // although clipping will occur more at higher volumes.  Volume gets quieter
   // as the percentage gets lower, and then switches to silence at 0%.
@@ skipping 30 matching lines @@
   bool connected_;
   int reconnect_tries_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_AUDIO_HANDLER_H_