Extension settings API: force through changes that come from sync (ignoring

chrome/browser/extensions/settings/syncable_settings_storage.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_BROWSER_EXTENSIONS_SETTINGS_SYNCABLE_SETTINGS_STORAGE_H_
 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_SYNCABLE_SETTINGS_STORAGE_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 16 matching lines @@
       const std::string& extension_id,
       // Ownership taken.
       SettingsStorage* delegate);
 
   virtual ~SyncableSettingsStorage();
 
   // SettingsStorage implementation.
   virtual ReadResult Get(const std::string& key) OVERRIDE;
   virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
   virtual ReadResult Get() OVERRIDE;
-  virtual WriteResult Set(const std::string& key, const Value& value) OVERRIDE;
-  virtual WriteResult Set(const DictionaryValue& settings) OVERRIDE;
+  virtual WriteResult Set(
+      WriteOptions options,
+      const std::string& key,
+      const Value& value) OVERRIDE;
+  virtual WriteResult Set(
+      WriteOptions options, const DictionaryValue& values) OVERRIDE;
   virtual WriteResult Remove(const std::string& key) OVERRIDE;
   virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE;
   virtual WriteResult Clear() OVERRIDE;
 
   // Sync-related methods, analogous to those on SyncableService (handled by
   // ExtensionSettings), but with looser guarantees about when the methods
   // can be called.
 
   // Must only be called if sync isn't already active; not idempotent since
   // behaviour would be undefined given differerent values of |sync_state|.
@@ skipping 60 matching lines @@
   // Keys of the settings that are currently being synced.  Only used to decide
   // whether an ACTION_ADD or ACTION_UPDATE should be sent to sync on a Set().
   std::set<std::string> synced_keys_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncableSettingsStorage);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SYNCABLE_SETTINGS_STORAGE_H_