mash: Migrate locale observer and notification to common.

ash/common/system/tray/wm_system_tray_notifier.h

Index: ash/common/system/tray/wm_system_tray_notifier.h
diff --git a/ash/common/system/tray/wm_system_tray_notifier.h b/ash/common/system/tray/wm_system_tray_notifier.h
index 7060d4725e86f32161ccb08b1e811a025943375e..f6d8c7b52791653da9829e7e37dead400afe9c64 100644
--- a/ash/common/system/tray/wm_system_tray_notifier.h
+++ b/ash/common/system/tray/wm_system_tray_notifier.h
@@ -7,6 +7,7 @@
 
 #include "ash/ash_export.h"
 #include "ash/common/accessibility_types.h"
+#include "ash/common/system/locale/locale_observer.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 
@@ -52,6 +53,14 @@ class ASH_EXPORT WmSystemTrayNotifier {
   void NotifyRefreshIME();
   void NotifyRefreshIMEMenu(bool is_active);
 
+  // Locale.
+  void AddLocaleObserver(LocaleObserver* observer);
+  void RemoveLocaleObserver(LocaleObserver* observer);
+  void NotifyLocaleChanged(LocaleObserver::Delegate* delegate,
+                           const std::string& cur_locale,
+                           const std::string& from_locale,
+                           const std::string& to_locale);
+
   // OS updates.
   void AddUpdateObserver(UpdateObserver* observer);
   void RemoveUpdateObserver(UpdateObserver* observer);
@@ -66,8 +75,9 @@ class ASH_EXPORT WmSystemTrayNotifier {
 
  private:
   base::ObserverList<AccessibilityObserver> accessibility_observers_;
-  base::ObserverList<IMEObserver> ime_observers_;
   base::ObserverList<ClockObserver> clock_observers_;

[James Cook, 2016/06/22 02:53:29]

thanks for fixing this ordering

+  base::ObserverList<IMEObserver> ime_observers_;
+  base::ObserverList<LocaleObserver> locale_observers_;
   base::ObserverList<UpdateObserver> update_observers_;
 
 #if defined(OS_CHROMEOS)