ExtensionPrefs: remove FixMissingPrefs

extensions/browser/extension_prefs.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 #define EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 604 matching lines @@
   const base::DictionaryValue* GetExtensionPref(const std::string& id) const;
 
   // Modifies the extensions disable reasons to add a new reason, remove an
   // existing reason, or clear all reasons. Notifies observers if the set of
   // DisableReasons has changed.
   // If |change| is DISABLE_REASON_CLEAR, then |reason| is ignored.
   void ModifyDisableReasons(const std::string& extension_id,
                             int reasons,
                             DisableReasonChange change);
 
-  // Fix missing preference entries in the extensions that are were introduced
-  // in a later Chrome version.
-  void FixMissingPrefs(const ExtensionIdList& extension_ids);
-
   // Installs the persistent extension preferences into |prefs_|'s extension
   // pref store. Does nothing if extensions_disabled_ is true.
   void InitPrefStore();
 
   // Checks whether there is a state pref for the extension and if so, whether
   // it matches |check_state|.
   bool DoesExtensionHaveState(const std::string& id,
                               Extension::State check_state) const;
 
   // Reads the list of strings for |pref| from user prefs into
@@ skipping 51 matching lines @@
   bool extensions_disabled_;
 
   base::ObserverList<ExtensionPrefsObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_PREFS_H_