Add chrome.inputMethodPrivate.onImeMenuActivationChanged API.

chrome/browser/chromeos/preferences.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 "chrome/browser/chromeos/preferences.h"
 
 #include <vector>
 
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/display/display_manager.h"
@@ skipping 570 matching lines @@
     if (!value.empty()) {
       split_values = base::SplitString(value, ",", base::TRIM_WHITESPACE,
                                        base::SPLIT_WANT_ALL);
     }
     ime_state_->SetEnabledExtensionImes(&split_values);
   }
 
   if (pref_name == prefs::kLangugaeImeMenuActivated &&
       (reason == REASON_PREF_CHANGED || reason == REASON_ACTIVE_USER_CHANGED)) {
     const bool activated = ime_menu_activated_.GetValue();
-    if (activated)
-      DVLOG(1) << "IME menu is activated.";
-    else
-      DVLOG(1) << "IME menu is deactivated.";
-    // TODO(azurewei): Fire inputMethodPrivate API event.
+    input_method::InputMethodManager::Get()->ImeMenuActivationChanged(
+        activated);
   }
 
   if (user_is_active) {
     system::InputDeviceSettings::Get()->UpdateTouchpadSettings(
         touchpad_settings);
     system::InputDeviceSettings::Get()->UpdateMouseSettings(mouse_settings);
   }
 
   if (user_is_primary_ && (reason != REASON_PREF_CHANGED ||
                            pref_name == prefs::kWakeOnWifiDarkConnect)) {
@@ skipping 123 matching lines @@
   touch_hud_projection_enabled_.SetValue(enabled);
 }
 
 void Preferences::ActiveUserChanged(const user_manager::User* active_user) {
   if (active_user != user_)
     return;
   ApplyPreferences(REASON_ACTIVE_USER_CHANGED, "");
 }
 
 }  // namespace chromeos