Add a new GetInstance() method for remaining files with singleton classes under chrome/browser.

chrome/browser/chromeos/volume_bubble.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_VOLUME_BUBBLE_H_
 #define CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_H_
 #pragma once
 
 #include "base/singleton.h"

[joth, 2010/12/09 15:06:40]

remove, fwd declare traits

 #include "chrome/browser/chromeos/setting_level_bubble.h"
 
 namespace chromeos {
 
 // Singleton class controlling volume bubble.
 class VolumeBubble : public SettingLevelBubble {
  public:
-  static VolumeBubble* instance() {
-    return Singleton<VolumeBubble>::get();
-  }

[joth, 2010/12/09 15:06:40]

this style is going to be very hard to stop creeping back into the code

+  static VolumeBubble* instance();
 
  private:
   friend struct DefaultSingletonTraits<VolumeBubble>;
 
   VolumeBubble();
   virtual ~VolumeBubble() {}
 
   DISALLOW_COPY_AND_ASSIGN(VolumeBubble);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_VOLUME_BUBBLE_H_