[SyncFS] Drop test only un-thread-safe getters from SyncEngine (4)

chrome/browser/sync_file_system/drive_backend/sync_engine.h

 // Copyright 2013 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_DRIVE_BACKEND_SYNC_ENGINE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 102 matching lines @@
   virtual void OnPushNotificationEnabled(bool enabled) OVERRIDE;
 
   // drive::DriveServiceObserver overrides.
   virtual void OnReadyToSendRequests() OVERRIDE;
   virtual void OnRefreshTokenInvalid() OVERRIDE;
 
   // net::NetworkChangeNotifier::NetworkChangeObserver overrides.
   virtual void OnNetworkChanged(
       net::NetworkChangeNotifier::ConnectionType type) OVERRIDE;
 
-  drive::DriveServiceInterface* GetDriveService();
-  drive::DriveUploaderInterface* GetDriveUploader();
-
   void OnPendingFileListUpdated(int item_count);
   void OnFileStatusChanged(const fileapi::FileSystemURL& url,
                            SyncFileStatus file_status,
                            SyncAction sync_action,
                            SyncDirection direction);
   void UpdateServiceState(RemoteServiceState state,
                           const std::string& description);
 
  private:
   class WorkerObserver;
@@ skipping 39 matching lines @@
   CallbackTracker callback_tracker_;
 
   base::WeakPtrFactory<SyncEngine> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(SyncEngine);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_H_