SyncServiceObserver  171 chrome/browser/sync_file_system/drive_backend/sync_engine.cc void SyncEngine::AddServiceObserver(SyncServiceObserver* observer) {
SyncServiceObserver   83 chrome/browser/sync_file_system/drive_backend/sync_engine.h   virtual void AddServiceObserver(SyncServiceObserver* observer) OVERRIDE;
SyncServiceObserver  204 chrome/browser/sync_file_system/drive_backend/sync_engine.h   ObserverList<SyncServiceObserver> service_observers_;