Make installer_util_unittests build on Win64

chrome/installer/upgrade_test.gyp

 # Copyright (c) 2011 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': {
     'version_py': '../../chrome/tools/build/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(DEPTH)/build/util/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
@@ skipping 62 matching lines @@
             '../../testing/gtest.gyp:gtest',
             '../chrome.gyp:installer_util',
             '../common_constants.gyp:common_constants',
           ],
           'include_dirs': [
             '../..',
           ],
           'sources': [
             'test/alternate_version_generator_main.cc',
           ],
+          # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+          'msvs_disabled_warnings': [ 4267, ],
         },
       ],
     }],
     [ 'branding == "Chrome"', {
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }