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

chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h

Index: chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h
diff --git a/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h b/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h
index e2086e7ca62c6678d711cead3d966f3d0199d820..2ce3b129d3b7298e51a21cdd2fe84bb0d7d0c496 100644
--- a/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h
+++ b/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h
@@ -67,6 +67,12 @@ class CrosLanguageOptionsHandler
   // |args| will contain the input method ID as string (ex. "mozc").
   void InputMethodOptionsOpenCallback(const base::ListValue* args);
 
+  // Called when the 'activate-system-ime-menu' checkbox is checked
+  void ActivateSystemImeMenuCallback(const base::ListValue* args);
+
+  // Called when the 'activate-system-ime-menu' checkbox is unchecked
+  void DeactivateSystemImeMenuCallback(const base::ListValue* args);
+
   // Adds the name of the extension that provides the IME to each entry in the
   // |list| of extension IMEs.
   void AddImeProvider(base::ListValue* list);