disable c4267 in libpng for building on win x64

third_party/libpng/libpng.gyp

 # 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.
 
 {
   'variables': {
     'conditions': [
       [ 'os_posix == 1 and OS != "mac" and OS != "android"', {
         # Maybe link to system .so once the security concerns are thought
         # through, since we already use it due to GTK.
@@ skipping 42 matching lines @@
               '.',
             ],
             'defines': [
               'CHROME_PNG_WRITE_SUPPORT',
               'PNG_USER_CONFIG',
             ],
           },
           'export_dependent_settings': [
             '../zlib/zlib.gyp:zlib',
           ],
+          # TODO(jschuh): http://crbug.com/167187
+          'msvs_disabled_warnings': [ 4267 ],
           'conditions': [
             ['OS!="win"', {'product_name': 'png'}],
             ['OS=="win"', {
               'type': '<(component)',
             }, {
               # Chromium libpng does not support building as a shared_library
               # on non-Windows platforms.
               'type': 'static_library',
             }],
             ['OS=="win" and component=="shared_library"', {
@@ skipping 53 matching lines @@
             ],
           },
           'includes': [
             '../../build/shim_headers.gypi',
           ],
         },
       ],
     }],
   ],
 }