Implement polling part of DriveFileSyncService

chrome/browser/sync_file_system/sync_file_system_service.h

 // Copyright (c) 2012 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_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 107 matching lines @@
 
   void DidGetLocalChangeStatus(const fileapi::SyncFileStatusCallback& callback,
                                bool has_pending_local_changes);
 
   void OnSyncEnabledForRemoteSync();
 
   // RemoteFileSyncService::Observer overrides.
   virtual void OnLocalChangeAvailable(int64 pending_changes) OVERRIDE;
 
   // LocalFileSyncService::Observer overrides.
-  virtual void OnRemoteChangeAvailable(int64 pending_changes) OVERRIDE;
+  virtual void OnRemoteChangeQueueUpdated(int64 pending_changes) OVERRIDE;
   virtual void OnRemoteServiceStateUpdated(
       RemoteServiceState state,
       const std::string& description) OVERRIDE;
 
   Profile* profile_;
 
   int64 pending_local_changes_;
   int64 pending_remote_changes_;
 
   scoped_ptr<LocalFileSyncService> local_file_service_;
@@ skipping 39 matching lines @@
   // ProfileKeyedServiceFactory overrides.
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       Profile* profile) const OVERRIDE;
 
   mutable scoped_ptr<RemoteFileSyncService> mock_remote_file_service_;
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_SERVICE_H_