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

ash/system/tray_accessibility.h

 // Copyright (c) 2012 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 ASH_SYSTEM_TRAY_ACCESSIBILITY_H_
 #define ASH_SYSTEM_TRAY_ACCESSIBILITY_H_
 
 #include "ash/accessibility_delegate.h"
 #include "ash/shell_observer.h"
 #include "ash/system/tray/tray_details_view.h"
@@ skipping 18 matching lines @@
 namespace ash {
 class HoverHighlightView;
 class SystemTrayItem;
 
 class ASH_EXPORT AccessibilityObserver {
  public:
   virtual ~AccessibilityObserver() {}
 
   // Notifies when accessibilty mode changes.
   virtual void OnAccessibilityModeChanged(
-      AccessibilityNotificationVisibility notify) = 0;
+      ui::AccessibilityNotificationVisibility notify) = 0;
 };
 
 
 namespace tray {
 
 class AccessibilityPopupView : public TrayNotificationView {
  public:
   AccessibilityPopupView(SystemTrayItem* owner, uint32 enabled_state_bits);
 
   const views::Label* label_for_test() const { return label_; }
@@ skipping 66 matching lines @@
   // Overridden from TrayImageItem.
   bool GetInitialVisibility() override;
   views::View* CreateDefaultView(user::LoginStatus status) override;
   views::View* CreateDetailedView(user::LoginStatus status) override;
   void DestroyDefaultView() override;
   void DestroyDetailedView() override;
   void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
 
   // Overridden from AccessibilityObserver.
   void OnAccessibilityModeChanged(
-      AccessibilityNotificationVisibility notify) override;
+      ui::AccessibilityNotificationVisibility notify) override;
 
   views::View* default_;
   tray::AccessibilityPopupView* detailed_popup_;
   tray::AccessibilityDetailedView* detailed_menu_;
 
   // Bitmap of fvalues from AccessibilityState.  Can contain any or
   // both of A11Y_SPOKEN_FEEDBACK A11Y_BRAILLE_DISPLAY_CONNECTED.
   uint32 request_popup_view_state_;
 
   bool tray_icon_visible_;
   user::LoginStatus login_;
 
   // Bitmap of values from AccessibilityState enum.
   uint32 previous_accessibility_state_;
 
   // A11y feature status on just entering the lock screen.
   bool show_a11y_menu_on_lock_screen_;
 
   friend class chromeos::TrayAccessibilityTest;
   DISALLOW_COPY_AND_ASSIGN(TrayAccessibility);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_ACCESSIBILITY_H_