Add ScopedFile class which supports scope-out deletion and/or callbacks

webkit/blob/webkit_blob.gypi

 # 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.
 
 {
   'variables': {
     'webkit_blob_sources': [
       '../blob/blob_data.cc',
       '../blob/blob_data.h',
       '../blob/blob_storage_controller.cc',
       '../blob/blob_storage_controller.h',
       '../blob/blob_url_request_job.cc',
       '../blob/blob_url_request_job.h',
       '../blob/blob_url_request_job_factory.cc',
       '../blob/blob_url_request_job_factory.h',
       '../blob/local_file_stream_reader.cc',
       '../blob/local_file_stream_reader.h',
+      '../blob/scoped_file.cc',
+      '../blob/scoped_file.h',
       '../blob/shareable_file_reference.cc',
       '../blob/shareable_file_reference.h',
       '../blob/view_blob_internals_job.cc',
       '../blob/view_blob_internals_job.h',
     ],
   },
 }