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

chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.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/ui/webui/options/chromeos/cros_language_options_handler.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 66 matching lines @@
           IDS_OPTIONS_SETTINGS_LANGUAGES_SIGN_OUT_BUTTON));
   localized_strings->SetString("extensionImeLable",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD_EXTENSION_IME));
   localized_strings->SetString("extensionImeDescription",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD_EXTENSION_DESCRIPTION));
   localized_strings->SetString("noInputMethods",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_NO_INPUT_METHODS));
+  localized_strings->SetString(
+      "activateImeMenu", l10n_util::GetStringUTF16(

[michaelpg, 2016/01/04 16:37:36]

nit: use consistent formatting with the above lines:

localized_strings->SetString("activateImeMenu",
    l10n_util::GetStringUTF16(
        IDS_WHATEVER));

[Azure Wei, 2016/01/05 06:48:03]

Done.

+                             IDS_OPTIONS_SETTINGS_LANGUAGES_ACTIVATE_IME_MENU));
+  localized_strings->SetString(
+      "activateImeMenuDesc",
+      l10n_util::GetStringUTF16(
+          IDS_OPTIONS_SETTINGS_LANGUAGES_ACTIVATE_IME_MENU_DESCRIPTION));
 
   // GetSupportedInputMethods() never returns NULL.
   localized_strings->Set("languageList", GetAcceptLanguageList().release());
   localized_strings->Set("inputMethodList", GetInputMethodList());
 
   input_method::InputMethodManager* manager =
       input_method::InputMethodManager::Get();
   input_method::InputMethodDescriptors ext_ime_descriptors;
   manager->GetActiveIMEState()->GetInputMethodExtensions(&ext_ime_descriptors);
 
@@ skipping 165 matching lines @@
         extension_ime_util::GetExtensionIDFromInputMethodID(input_method_id);
     const extensions::Extension* extension =
         enabled_extensions.GetByID(extension_id);
     if (extension)
       entry->SetString("extensionName", extension->name());
   }
 }
 
 }  // namespace options
 }  // namespace chromeos