Convert TrayAccessibility to wm common types

ash/system/tray/system_tray_notifier.cc

 // 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.
 
 #include "ash/system/tray/system_tray_notifier.h"
 
 namespace ash {
 
 SystemTrayNotifier::SystemTrayNotifier() {
 }
 
 SystemTrayNotifier::~SystemTrayNotifier() {
 }
 
-void SystemTrayNotifier::AddAccessibilityObserver(
-    AccessibilityObserver* observer) {
-  accessibility_observers_.AddObserver(observer);
-}
-
-void SystemTrayNotifier::RemoveAccessibilityObserver(
-    AccessibilityObserver* observer) {
-  accessibility_observers_.RemoveObserver(observer);
-}
-
 void SystemTrayNotifier::AddAudioObserver(AudioObserver* observer) {
   audio_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveAudioObserver(AudioObserver* observer) {
   audio_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::AddIMEObserver(IMEObserver* observer) {
   ime_observers_.AddObserver(observer);
@@ skipping 129 matching lines @@
     VirtualKeyboardObserver* observer) {
   virtual_keyboard_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveVirtualKeyboardObserver(
     VirtualKeyboardObserver* observer) {
   virtual_keyboard_observers_.RemoveObserver(observer);
 }
 #endif
 
-void SystemTrayNotifier::NotifyAccessibilityModeChanged(
-    ui::AccessibilityNotificationVisibility notify) {
-  FOR_EACH_OBSERVER(
-      AccessibilityObserver,
-      accessibility_observers_,
-      OnAccessibilityModeChanged(notify));
-}
-
 void SystemTrayNotifier::NotifyAudioOutputVolumeChanged(uint64_t node_id,
                                                         double volume) {
   FOR_EACH_OBSERVER(AudioObserver, audio_observers_,
                     OnOutputNodeVolumeChanged(node_id, volume));
 }
 
 void SystemTrayNotifier::NotifyAudioOutputMuteChanged(bool mute_on,
                                                       bool system_adjust) {
   FOR_EACH_OBSERVER(AudioObserver, audio_observers_,
                     OnOutputMuteChanged(mute_on, system_adjust));
@@ skipping 155 matching lines @@
 void SystemTrayNotifier::NotifyVirtualKeyboardSuppressionChanged(
     bool suppressed) {
   FOR_EACH_OBSERVER(VirtualKeyboardObserver,
                     virtual_keyboard_observers_,
                     OnKeyboardSuppressionChanged(suppressed));
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash