Make icu compile for Win64

icu.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': {
     'use_system_icu%': 0,
     'icu_use_data_file_flag%': 0,
   },
   'target_defaults': {
@@ skipping 19 matching lines @@
           }],
         ],
         # TODO(mark): Looks like this is causing the "public" include
         # directories to show up twice in some targets in this file.  Fix.
         'include_dirs': [
           'public/common',
           'public/i18n',
           'source/common',
           'source/i18n',
         ],
-        'msvs_disabled_warnings': [4005, 4068, 4355, 4996],
+        'msvs_disabled_warnings': [4005, 4068, 4355, 4996, 4267],
       },
       'targets': [
         {
           'target_name': 'icudata',
           'type': '<(library)',
           'sources': [
              # These are hand-generated, but will do for now.  The linux
              # version is an identical copy of the (mac) icudt46l_dat.S file,
              # modulo removal of the .private_extern and .const directives and
              # with no leading underscore on the icudt46_dat symbol.
@@ skipping 745 matching lines @@
         {
           'target_name': 'icuuc',
           'type': 'none',
           'dependencies': ['system_icu'],
           'export_dependent_settings': ['system_icu'],
         },
       ],
     }],
   ],
 }