Sync FileSystem: Add simulated relaunch of DriveFileSyncService on its unit_tests

chrome/browser/sync_file_system/drive_file_sync_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_DRIVE_FILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_FILE_SYNC_SERVICE_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 44 matching lines @@
   virtual ~DriveFileSyncService();
 
   // Creates DriveFileSyncClient instance for testing.
   // |metadata_store| must be initialized beforehand.
   static scoped_ptr<DriveFileSyncService> CreateForTesting(
       Profile* profile,
       const base::FilePath& base_dir,
       scoped_ptr<DriveFileSyncClientInterface> sync_client,
       scoped_ptr<DriveMetadataStore> metadata_store);
 
+  // Destroy |sync_service| and pass the ownership of |sync_client| to caller

[nhiroki, 2013/03/01 03:25:21]

nit: Destroy->Destroys, pass->passes

[tzik, 2013/03/01 03:43:01]

Done.

+  // for testing.
+  static scoped_ptr<DriveFileSyncClientInterface>
+  DestroyAndPassSyncClientForTesting(
+      scoped_ptr<DriveFileSyncService> sync_service);
+
   // RemoteFileSyncService overrides.
   virtual void AddServiceObserver(Observer* observer) OVERRIDE;
   virtual void AddFileStatusObserver(FileStatusObserver* observer) OVERRIDE;
   virtual void RegisterOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) OVERRIDE;
   virtual void UnregisterOriginForTrackingChanges(
       const GURL& origin,
       const SyncStatusCallback& callback) OVERRIDE;
   virtual void ProcessRemoteChange(
@@ skipping 360 matching lines @@
   // Use WeakPtrFactory instead of SupportsWeakPtr to revoke the weak pointer
   // in |token_|.
   base::WeakPtrFactory<DriveFileSyncService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_FILE_SYNC_SERVICE_H_