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

chrome/browser/accessibility/browser_accessibility_state.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_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_H_
 #define CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/singleton.h"

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

remove, fwd declare traits

 
 // The BrowserAccessibilityState class is used to determine if Chrome should be
 // customized for users with assistive technology, such as screen readers. We
 // modify the behavior of certain user interfaces to provide a better experience
 // for screen reader users. The way we detect a screen reader program is
 // different for each platform.
 //
 // Screen Reader Detection
 // (1) On windows many screen reader detection mechinisms will give false
 // positives like relying on the SPI_GETSCREENREADER system parameter. In Chrome
 // we attempt to dynamically detect a MSAA client screen reader by calling
 // NotifiyWinEvent in WidgetWin with a custom ID and wait to see if the ID
 // is requested by a subsequent call to WM_GETOBJECT.
 // (2) On mac we detect if VoiceOver is running. This is stored in a preference
 // file for Universal Access with the key "voiceOverOnOffKey".
 class BrowserAccessibilityState {
  public:
+  // Returns the singleton instance.
+  static BrowserAccessibilityState* GetInstance();
+
   ~BrowserAccessibilityState();
 
   // Called when screen reader client is detected.
   void OnScreenReaderDetected();
 
   // Returns true if the Chrome browser should be customized for accessibility.
   bool IsAccessibleBrowser();
 
  private:
   BrowserAccessibilityState();
   friend struct DefaultSingletonTraits<BrowserAccessibilityState>;
 
   // Set to true when a screen reader client is detected.
   bool screen_reader_active_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityState);
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_STATE_H_