ash: Use mojo LocaleNotificationController interface.

ash/common/system/tray/system_tray_notifier.cc

 // Copyright 2016 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/common/system/tray/system_tray_notifier.h"
 
 #include "ash/common/system/accessibility_observer.h"
 #include "ash/common/system/audio/audio_observer.h"
 #include "ash/common/system/date/clock_observer.h"
 #include "ash/common/system/ime/ime_observer.h"
@@ skipping 111 matching lines @@
 void SystemTrayNotifier::NotifyRefreshIME() {
   for (auto& observer : ime_observers_)
     observer.OnIMERefresh();
 }
 
 void SystemTrayNotifier::NotifyRefreshIMEMenu(bool is_active) {
   for (auto& observer : ime_observers_)
     observer.OnIMEMenuActivationChanged(is_active);
 }
 
-void SystemTrayNotifier::AddLocaleObserver(LocaleObserver* observer) {
-  locale_observers_.AddObserver(observer);
-}
-
-void SystemTrayNotifier::RemoveLocaleObserver(LocaleObserver* observer) {
-  locale_observers_.RemoveObserver(observer);
-}
-
-void SystemTrayNotifier::NotifyLocaleChanged(LocaleObserver::Delegate* delegate,
-                                             const std::string& cur_locale,
-                                             const std::string& from_locale,
-                                             const std::string& to_locale) {
-  for (auto& observer : locale_observers_)
-    observer.OnLocaleChanged(delegate, cur_locale, from_locale, to_locale);
-}
-
 void SystemTrayNotifier::AddUpdateObserver(UpdateObserver* observer) {
   update_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveUpdateObserver(UpdateObserver* observer) {
   update_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::NotifyUpdateRecommended(const UpdateInfo& info) {
   for (auto& observer : update_observers_)
@@ skipping 221 matching lines @@
 
 void SystemTrayNotifier::NotifyVirtualKeyboardSuppressionChanged(
     bool suppressed) {
   for (auto& observer : virtual_keyboard_observers_)
     observer.OnKeyboardSuppressionChanged(suppressed);
 }
 
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace ash