Fix to enable toggling accessibility using Ctrl+Alt+Z

chrome/browser/chromeos/login/wizard_accessibility_helper.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_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_
 #pragma once
 
 #include <map>
 #include <vector>
@@ skipping 19 matching lines @@
  public:
   // Get Singleton instance of WizardAccessibilityHelper.
   static WizardAccessibilityHelper* GetInstance();
 
   // Get accelerator for enabling accessibility.
   static views::Accelerator GetAccelerator();
 
   // Enables Accessibility by setting the accessibility pref and registers
   // all views in the view buffer to raise accessibility notifications,
   // including the specified |view_tree|.
-  void EnableAccessibility(views::View* view_tree);
+  void EnableAccessibilityForView(views::View* view_tree);
 
   // Enables accessibility for the specified |view_tree| if the
   // accessibility pref is already set. Otherwise the |view_tree| is
   // added to a view buffer so that accessibility can be enabled for it
   // later when requested.
   void MaybeEnableAccessibility(views::View* view_tree);
 
   // Speak the given text if the accessibility pref is already set. |queue|
   // specifies whether this utterance will be queued or spoken immediately.
   // |interruptible| specified whether this utterance can be flushed by a
   // subsequent utterance.
   void MaybeSpeak(const char* str, bool queue, bool interruptible);
 
   // Unregisters all accessibility notifications
   void UnregisterNotifications();
 
+  // Toggles accessibility support. If |view_tree| is null, only the
+  // access preference setting is toggled. |view_tree| has no effect while
+  // disabling accessibility.
+  void ToggleAccessibility(views::View* view_tree);
+
  private:
   friend struct DefaultSingletonTraits<WizardAccessibilityHelper>;
 
   WizardAccessibilityHelper();
 
   virtual ~WizardAccessibilityHelper() {}
 
   void RegisterNotifications();
 
+  bool IsAccessibilityEnabled();
+
+  void SetAccessibilityEnabled(bool);
+
   static scoped_ptr<views::Accelerator> accelerator_;
 
   void AddViewToBuffer(views::View* view_tree);
 
   std::map<views::View*, bool> views_buffer_;
 
   std::vector<AccessibleViewHelper*> accessible_view_helpers_;
 
   scoped_ptr<WizardAccessibilityHandler> accessibility_handler_;
 
   Profile* profile_;
 
   // Used for tracking registrations to accessibility notifications.
   NotificationRegistrar registrar_;
 
   bool registered_notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(WizardAccessibilityHelper);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_