Add an option in language settings for activating the IME menu.

chrome/browser/chromeos/preferences.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 #define CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
 
 #include <string>
 
 #include "ash/shell_observer.h"
@@ skipping 120 matching lines @@
   IntegerPrefMember touchpad_sensitivity_;
   BooleanPrefMember primary_mouse_button_right_;
   FilePathPrefMember download_default_directory_;
   BooleanPrefMember touch_hud_projection_enabled_;
 
   // Input method preferences.
   StringPrefMember preload_engines_;
   StringPrefMember current_input_method_;
   StringPrefMember previous_input_method_;
   StringPrefMember enabled_extension_imes_;
+  BooleanPrefMember ime_menu_activated_;
 
   BooleanPrefMember xkb_auto_repeat_enabled_;
   IntegerPrefMember xkb_auto_repeat_delay_pref_;
   IntegerPrefMember xkb_auto_repeat_interval_pref_;
 
   BooleanPrefMember wake_on_wifi_darkconnect_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   // User owning these preferences.
   const user_manager::User* user_;
 
   // Whether user is a primary user.
   bool user_is_primary_;
 
   // Input Methods state for this user.
   scoped_refptr<input_method::InputMethodManager::State> ime_state_;
 
   scoped_ptr<input_method::InputMethodSyncer> input_method_syncer_;
 
   DISALLOW_COPY_AND_ASSIGN(Preferences);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PREFERENCES_H_