Remove PrefService::ScheduleSavePersistentPrefs and SavePersistentPrefs.

chrome/common/persistent_pref_store.h

 // 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.
 
 #ifndef CHROME_COMMON_PERSISTENT_PREF_STORE_H_
 #define CHROME_COMMON_PERSISTENT_PREF_STORE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 62 matching lines @@
   // Reads the preferences from disk. Notifies observers via
   // "PrefStore::OnInitializationCompleted" when done.
   virtual PrefReadError ReadPrefs() = 0;
 
   // Reads the preferences from disk asynchronously. Notifies observers via
   // "PrefStore::OnInitializationCompleted" when done. Also it fires
   // |error_delegate| if it is not NULL and reading error has occurred.
   // Owns |error_delegate|.
   virtual void ReadPrefsAsync(ReadErrorDelegate* error_delegate) = 0;
 
-  // Writes the preferences to disk immediately.
-  virtual bool WritePrefs() = 0;
-
-  // Schedules an asynchronous write operation.
-  virtual void ScheduleWritePrefs() = 0;
-
   // Lands any pending writes to disk.
   virtual void CommitPendingWrite() = 0;
 };
 
 #endif  // CHROME_COMMON_PERSISTENT_PREF_STORE_H_