[FileAPI] Add file open ID and close callback

content/renderer/pepper/null_file_system_callback_dispatcher.cc

 // Copyright (c) 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.
 
 #include "content/renderer/pepper/null_file_system_callback_dispatcher.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util_proxy.h"
 #include "base/logging.h"
 #include "googleurl/src/gurl.h"
@@ skipping 28 matching lines @@
   NOTREACHED();
 }
 
 void NullFileSystemCallbackDispatcher::DidWrite(int64 /* bytes */,
                                                 bool /* complete */) {
   NOTREACHED();
 }
 
 void NullFileSystemCallbackDispatcher::DidOpenFile(
     base::PlatformFile /* file */,
+    int /* file_open_id */,
     quota::QuotaLimitType /* quota_policy */) {
   NOTREACHED();
 }
 
 void NullFileSystemCallbackDispatcher::DidFail(
     base::PlatformFileError /* platform_error */) {
   NOTREACHED();
 }
 
 }  // namespace content