Remove stray platform_file.h from chrome and components

chrome/utility/media_galleries/itunes_library_parser.h

 // Copyright 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.
 
 #ifndef CHROME_UTILITY_MEDIA_GALLERIES_ITUNES_LIBRARY_PARSER_H_
 #define CHROME_UTILITY_MEDIA_GALLERIES_ITUNES_LIBRARY_PARSER_H_
 
 #include <string>
 
-#include "base/platform_file.h"
 #include "chrome/common/media_galleries/itunes_library.h"
 
 namespace itunes {
 
 class ITunesLibraryParser {
  public:
   ITunesLibraryParser();
   ~ITunesLibraryParser();
 
   // Returns true if at least one track was found. Malformed track entries
   // are silently ignored.
   bool Parse(const std::string& xml);
 
   const parser::Library& library() { return library_; }
 
  private:
   parser::Library library_;
 
   DISALLOW_COPY_AND_ASSIGN(ITunesLibraryParser);
 };
 
 }  // namespace itunes
 
 #endif  // CHROME_UTILITY_MEDIA_GALLERIES_ITUNES_LIBRARY_PARSER_H_