Refactor preference syncing.

chrome/browser/chromeos/status/input_method_menu.cc

 // Copyright (c) 2011 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/status/input_method_menu.h"
 
 #include <string>
 #include <vector>
 
 #include "base/string_split.h"
@@ skipping 626 matching lines @@
       language_code == "de") {
     text = GetLanguageName(language_code) + L" - ";
   }
   text += input_method::GetString(input_method.display_name, input_method.id);
 
   DCHECK(!text.empty());
   return text;
 }
 
 void InputMethodMenu::RegisterPrefs(PrefService* local_state) {
-  local_state->RegisterStringPref(language_prefs::kPreferredKeyboardLayout, "");
+  local_state->RegisterStringPref(language_prefs::kPreferredKeyboardLayout,
+                                  "",
+                                  PrefService::UNSYNCABLE_PREF);
 }
 
 void InputMethodMenu::Observe(NotificationType type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
   if (type == NotificationType::LOGIN_USER_CHANGED) {
     // When a user logs in, we should remove |this| object from the observer
     // list so that PreferenceUpdateNeeded() does not update the local state
     // anymore.
     CrosLibrary::Get()->GetInputMethodLibrary()->RemoveObserver(this);
   }
 }
 
 void InputMethodMenu::SetMinimumWidth(int width) {
   // On the OOBE network selection screen, fixed width menu would be preferable.
   minimum_input_method_menu_width_ = width;
 }
 
 }  // namespace chromeos