Make chrome/browser/chromeos/accessibility compile on Athena with use_ash=0

chrome/browser/ui/ash/system_tray_delegate_chromeos.h

 // Copyright 2013 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_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 #define CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 
 #include <vector>
 
 #include "ash/ime/input_method_menu_manager.h"
@@ skipping 185 matching lines @@
   gfx::NativeWindow GetNativeWindow() const;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) override;
 
   void OnLanguageRemapSearchKeyToChanged();
 
   void OnAccessibilityModeChanged(
-      ash::AccessibilityNotificationVisibility notify);
+      ui::AccessibilityNotificationVisibility notify);
 
   void UpdatePerformanceTracing();
 
   // Overridden from InputMethodManager::Observer.
   virtual void InputMethodChanged(input_method::InputMethodManager* manager,
                                   bool show_message) override;
 
   // Overridden from InputMethodMenuManager::Observer.
   virtual void InputMethodMenuItemChanged(
       ash::ime::InputMethodMenuManager* manager) override;
@@ skipping 73 matching lines @@
 
   base::WeakPtrFactory<SystemTrayDelegateChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegateChromeOS);
 };
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate();
 
 }  // namespace chromeos
 #endif  // CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_