Revert 271459 "Remove stray platform_file.h from webkit"

trunk/src/webkit/browser/fileapi/file_system_dir_url_request_job.cc

 // 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.
 
 #include "webkit/browser/fileapi/file_system_dir_url_request_job.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
+#include "base/platform_file.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/url_request/url_request.h"
 #include "url/gurl.h"
 #include "webkit/browser/fileapi/file_system_context.h"
@@ skipping 129 matching lines @@
         it->last_modified_time));
   }
 
   if (!has_more) {
     set_expected_content_size(data_.size());
     NotifyHeadersComplete();
   }
 }
 
 }  // namespace fileapi