[Sync] Move some extension-sync-related logic to ExtensionService

chrome/browser/sync/glue/extension_sync.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_GLUE_EXTENSION_SYNC_H_
 #define CHROME_BROWSER_SYNC_GLUE_EXTENSION_SYNC_H_
 #pragma once
 
 // This file contains functions necessary for syncing
 // extensions-related data types.
@@ skipping 58 matching lines @@
                       const Extension& extension,
                       const ExtensionServiceInterface& extensions_service,
                       sync_api::UserShare* user_share,
                       std::string* error);
 
 // Removes the server data for the given extension ID.
 void RemoveServerData(const ExtensionSyncTraits& traits,
                       const std::string& id,
                       sync_api::UserShare* user_share);
 
-// Starts updating the client data from the given server data.
-void UpdateClient(const ExtensionSyncTraits& traits,
-                  const sync_pb::ExtensionSpecifics& server_data,
-                  ExtensionServiceInterface* extensions_service);
-
-// Removes existing client data for the given extension.
-void RemoveFromClient(const ExtensionSyncTraits& traits,
-                      const std::string& id,
-                      ExtensionServiceInterface* extensions_service);
-
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_EXTENSION_SYNC_H_