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

chrome/browser/chromeos/wm_overview_controller.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_WM_OVERVIEW_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_WM_OVERVIEW_CONTROLLER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 46 matching lines @@
     ACTIVE_MODE,
 
     // OVERVIEW_MODE is the mode where the toplevel windows are hidden
     // and the user interacts with the snapshots.  This is when the
     // snapshot windows are shown and actively updated by this
     // controller.
     OVERVIEW_MODE,
   };
 
   // This class is a singleton.
-  static WmOverviewController* instance();
+  static WmOverviewController* GetInstance();
 
   // BrowserList::Observer methods
   void OnBrowserAdded(const Browser* browser) {}
   void OnBrowserRemoved(const Browser* browser);
   // End BrowserList::Observer methods
 
   // WmMessageListener::Observer methods
   // This is called immediately after a browser is added to the list.
   void ProcessWmMessage(const WmIpc::Message& message,
                         GdkWindow* window);
@@ skipping 76 matching lines @@
   // fashion.
   int browser_listener_index_;  // index of the last updated browser listener.
   int tab_contents_index_;      // index of the last updated tab contents.
 
   DISALLOW_COPY_AND_ASSIGN(WmOverviewController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_WM_OVERVIEW_CONTROLLER_H_