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

chrome/browser/ui/cocoa/accelerators_cocoa.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_UI_COCOA_ACCELERATORS_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_ACCELERATORS_COCOA_H_
 #pragma once
 
 #include <map>
 
 #include "app/menus/accelerator_cocoa.h"
 
+template <typename T> struct DefaultSingletonTraits;
+
 // This class maintains a map of command_ids to AcceleratorCocoa objects (see
 // chrome/app/chrome_command_ids.h). Currently, this only lists the commands
 // that are used in the Wrench menu.
 //
 // It is recommended that this class be used as a singleton so that the key map
 // isn't created multiple places.
 //
 //   #import "base/singleton.h"
 //   ...
-//   AcceleratorsCocoa* keymap = Singleton<AcceleratorsCocoa>::get();
+//   AcceleratorsCocoa* keymap = AcceleratorsCocoa::GetInstance();
 //   return keymap->GetAcceleratorForCommand(IDC_COPY);
 //
 class AcceleratorsCocoa {
  public:
-  AcceleratorsCocoa();
-  ~AcceleratorsCocoa() {}
-
   typedef std::map<int, menus::AcceleratorCocoa> AcceleratorCocoaMap;
 
   // Returns NULL if there is no accelerator for the command.
   const menus::AcceleratorCocoa* GetAcceleratorForCommand(int command_id);
 
+  // Returns the singleton instance.
+  static AcceleratorsCocoa* GetInstance();
+
  private:
+  friend struct DefaultSingletonTraits<AcceleratorsCocoa>;
+
+  AcceleratorsCocoa();
+  ~AcceleratorsCocoa() {}
+
   AcceleratorCocoaMap accelerators_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratorsCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_ACCELERATORS_COCOA_H_