Reduce diff to upstream re2 a bit.

third_party/re2/re2.gyp

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       'target_name': 're2',
       'type': 'static_library',
       'include_dirs': [
@@ skipping 52 matching lines @@
         'util/sparse_array.h',
         'util/sparse_set.h',
         'util/stringpiece.cc',
         'util/stringprintf.cc',
         'util/strutil.cc',
         'util/utf.h',
         'util/util.h',
       ],
       'conditions': [
         ['OS=="win"', {
-          'sources': [
-            'mswin/stdint.h'
-          ],
-          'include_dirs': [
-            'mswin'
-          ],
           'msvs_disabled_warnings': [ 4018, 4722, 4267 ],
         }]
       ]
     },
   ],
 }