Make ui build on Win64

ui/app_list/app_list.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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 82 matching lines @@
           ],
           'include_dirs': [
             '../../third_party/GTM',
           ],
         }, {  # OS!="mac"
           'sources/': [
             ['exclude', 'cocoa/'],
           ],
         }],
       ],
+      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+      'msvs_disabled_warnings': [ 4267, ],
     },
     {
       'target_name': 'app_list_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../compositor/compositor.gyp:compositor',
@@ skipping 28 matching lines @@
           ],
         }, {  # OS!="mac"
           'sources/': [
             ['exclude', 'cocoa/'],
           ],
         }],
       ],
     },
   ],
 }