chromeos: Make ash system tray directly observe IME state changes

ash/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/system/tray/system_tray_notifier.h"
 
 #include "ash/system/accessibility_observer.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
 #include "ash/system/date/clock_observer.h"
 #include "ash/system/enterprise/enterprise_domain_observer.h"
-#include "ash/system/ime/ime_observer.h"
 #include "ash/system/network/network_observer.h"
 #include "ash/system/network/network_portal_detector_observer.h"
 #include "ash/system/screen_security/screen_capture_observer.h"
 #include "ash/system/screen_security/screen_share_observer.h"
 #include "ash/system/session/last_window_closed_observer.h"
 #include "ash/system/session/logout_button_observer.h"
 #include "ash/system/session/session_length_limit_observer.h"
 #include "ash/system/status_area_focus_observer.h"
 #include "ash/system/tray_tracing.h"
 #include "ash/system/virtual_keyboard/virtual_keyboard_observer.h"
@@ skipping 74 matching lines @@
 void SystemTrayNotifier::RemoveEnterpriseDomainObserver(
     EnterpriseDomainObserver* observer) {
   enterprise_domain_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::NotifyEnterpriseDomainChanged() {
   for (auto& observer : enterprise_domain_observers_)
     observer.OnEnterpriseDomainChanged();
 }
 
-void SystemTrayNotifier::AddIMEObserver(IMEObserver* observer) {
-  ime_observers_.AddObserver(observer);
-}
-
-void SystemTrayNotifier::RemoveIMEObserver(IMEObserver* observer) {
-  ime_observers_.RemoveObserver(observer);
-}
-
-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::AddLastWindowClosedObserver(
     LastWindowClosedObserver* observer) {
   last_window_closed_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveLastWindowClosedObserver(
     LastWindowClosedObserver* observer) {
   last_window_closed_observers_.RemoveObserver(observer);
 }
 
@@ skipping 153 matching lines @@
   virtual_keyboard_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::NotifyVirtualKeyboardSuppressionChanged(
     bool suppressed) {
   for (auto& observer : virtual_keyboard_observers_)
     observer.OnKeyboardSuppressionChanged(suppressed);
 }
 
 }  // namespace ash