Enable sync for the settings from the Extension Settings API.

chrome/browser/sync/profile_sync_factory.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_SYNC_PROFILE_SYNC_FACTORY_H__
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_FACTORY_H__
 #pragma once
 
 #include <string>
 #include <utility>
@@ skipping 78 matching lines @@
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
   // Instantiates both a model associator and change processor for the
   // bookmark data type.  The pointers in the return struct are owned
   // by the caller.
   virtual SyncComponents CreateBookmarkSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
   // Instantiates both a model associator and change processor for the
+  // extension setting data type.  The pointers in the return struct are
+  // owned by the caller.
+  virtual SyncComponents CreateExtensionSettingSyncComponents(
+      ProfileSyncService* profile_sync_service,
+      browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
+
+  // Instantiates both a model associator and change processor for the
   // extension data type.  The pointers in the return struct are
   // owned by the caller.
   virtual SyncComponents CreateExtensionSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 
   // Instantiates both a model associator and change processor for the
   // password data type.  The pointers in the return struct are
   // owned by the caller.
   virtual SyncComponents CreatePasswordSyncComponents(
@@ skipping 32 matching lines @@
 
   // Instantiates both a model associator and change processor for the search
   // engine data type.  The pointers in the return struct are owned by the
   // caller.
   virtual SyncComponents CreateSearchEngineSyncComponents(
       ProfileSyncService* profile_sync_service,
       browser_sync::UnrecoverableErrorHandler* error_handler) = 0;
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_FACTORY_H__