Fix the case where the browser livelocks if we cannot open a file.

net/base/upload_data_stream.h

 // Copyright (c) 2006-2008 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 NET_BASE_UPLOAD_DATA_STREAM_H_
 #define NET_BASE_UPLOAD_DATA_STREAM_H_
 
 #include "net/base/file_stream.h"
 #include "net/base/upload_data.h"
 
@@ skipping 44 matching lines @@
   FileStream next_element_stream_;
 
   // The number of bytes remaining to be read from the currently open file
   // if the next element is of TYPE_FILE.
   uint64 next_element_remaining_;
 
   // Size and current read position within the stream.
   uint64 total_size_;
   uint64 current_position_;
 
+  bool file_failed_to_open_;
+
   DISALLOW_EVIL_CONSTRUCTORS(UploadDataStream);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_UPLOAD_DATA_STREAM_H_