[cros] Use ScheduleSavePersistentPrefs instead of SavePersistentPrefs.

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 415 matching lines @@
       // Sometimes (e.g. initial boot) |previous_input_method.id()| is empty.
       previous_input_method_pref_.SetValue(previous_input_method.id());
       current_input_method_pref_.SetValue(current_input_method.id());
       pref_service_->ScheduleSavePersistentPrefs();
     }
   } else if (screen_mode_ == StatusAreaHost::kViewsLoginMode ||
       screen_mode_ == StatusAreaHost::kWebUILoginMode) {
     if (g_browser_process && g_browser_process->local_state()) {
       g_browser_process->local_state()->SetString(
           language_prefs::kPreferredKeyboardLayout, current_input_method.id());
-      g_browser_process->local_state()->SavePersistentPrefs();
+      g_browser_process->local_state()->ScheduleSavePersistentPrefs();
     }
   }
 }
 
 void InputMethodMenu::PropertyListChanged(
     InputMethodManager* manager,
     const input_method::ImePropertyList& current_ime_properties) {
   // Usual order of notifications of input method change is:
   // 1. RegisterProperties(empty)
   // 2. RegisterProperties(list-of-new-properties)
@@ skipping 277 matching lines @@
   if (screen_mode_ == StatusAreaHost::kViewsLoginMode ||
       screen_mode_ == StatusAreaHost::kWebUILoginMode) {
     manager->RemovePreLoginPreferenceObserver(this);
   } else if (screen_mode_ == StatusAreaHost::kBrowserMode) {
     manager->RemovePostLoginPreferenceObserver(this);
   }
   manager->RemoveObserver(this);
 }
 
 }  // namespace chromeos