Refactor FileSystemMountPointProvider::CreateFileStream{Reader,Writer}

webkit/chromeos/fileapi/cros_mount_point_provider.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 WEBKIT_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 60 matching lines @@
   virtual void InitializeCopyOrMoveFileValidatorFactory(
       fileapi::FileSystemType type,
       scoped_ptr<fileapi::CopyOrMoveFileValidatorFactory> factory) OVERRIDE;
   virtual fileapi::FilePermissionPolicy GetPermissionPolicy(
       const fileapi::FileSystemURL& url,
       int permissions) const OVERRIDE;
   virtual fileapi::FileSystemOperation* CreateFileSystemOperation(
       const fileapi::FileSystemURL& url,
       fileapi::FileSystemContext* context,
       base::PlatformFileError* error_code) const OVERRIDE;
-  virtual webkit_blob::FileStreamReader* CreateFileStreamReader(
+  virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader(
       const fileapi::FileSystemURL& path,
       int64 offset,
       const base::Time& expected_modification_time,
       fileapi::FileSystemContext* context) const OVERRIDE;
-  virtual fileapi::FileStreamWriter* CreateFileStreamWriter(
+  virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter(
       const fileapi::FileSystemURL& url,
       int64 offset,
       fileapi::FileSystemContext* context) const OVERRIDE;
   virtual fileapi::FileSystemQuotaUtil* GetQuotaUtil() OVERRIDE;
   virtual void DeleteFileSystem(
       const GURL& origin_url,
       fileapi::FileSystemType type,
       fileapi::FileSystemContext* context,
       const DeleteFileSystemCallback& callback) OVERRIDE;
 
@@ skipping 36 matching lines @@
   // Globally visible mount points. System MountPonts instance should outlive
   // all CrosMountPointProvider instances, so raw pointer is safe.
   fileapi::ExternalMountPoints* system_mount_points_;
 
   DISALLOW_COPY_AND_ASSIGN(CrosMountPointProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // WEBKIT_CHROMEOS_FILEAPI_CROS_MOUNT_POINT_PROVIDER_H_