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

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 486 matching lines @@
 const char kLanguagePreloadEngines[] = "settings.language.preload_engines";
 const char kLanguagePreloadEnginesSyncable[] =
     "settings.language.preload_engines_syncable";
 
 // A string pref (comma-separated list) set to the extension IMEs to be enabled.
 const char kLanguageEnabledExtensionImes[] =
     "settings.language.enabled_extension_imes";
 const char kLanguageEnabledExtensionImesSyncable[] =
     "settings.language.enabled_extension_imes_syncable";
 
+// A boolean pref set to true if the system IME menu is activated.

[stevenjb, 2015/12/28 17:36:11]

This really isn't a "system" menu since the current design has it created and
controlled by the extension.

[Azure Wei, 2016/01/04 06:30:38]

All these 'system' related comments were removed.

+const char kLangugaeActivateImeMenu[] = "settings.language.activate_ime_menu";
+
 // A boolean pref to indicate whether we still need to add the globally synced
 // input methods. False after the initial post-OOBE sync.
 const char kLanguageShouldMergeInputMethods[] =
     "settings.language.merge_input_methods";
 
 // Integer prefs which determine how we remap modifier keys (e.g. swap Alt and
 // Control.) Possible values for these prefs are 0-4. See ModifierKey enum in
 // src/chrome/browser/chromeos/input_method/xkeyboard.h
 const char kLanguageRemapSearchKeyTo[] =
     // Note: we no longer use XKB for remapping these keys, but we can't change
@@ skipping 1651 matching lines @@
 const char kAllowDinosaurEasterEgg[] =
     "allow_dinosaur_easter_egg";
 
 #if defined(OS_ANDROID)
 // Whether the update menu item was clicked. Used to facilitate logging whether
 // Chrome was updated after the menu item is clicked.
 const char kClickedUpdateMenuItem[] = "omaha.clicked_update_menu_item";
 #endif
 
 }  // namespace prefs