Make intsafe.h workaround global

ui/ui.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,
   },
   'includes': [
     'shell_dialogs.gypi',
@@ skipping 441 matching lines @@
                 'd2d1.dll',
                 'd3d10_1.dll',
                 'dwmapi.dll',
               ],
               'AdditionalDependencies': [
                 'd2d1.lib',
                 'd3d10_1.lib',
                 'dwmapi.lib',
               ],
             },
-            'VCCLCompilerTool': {
-              'ForcedIncludeFiles': [ 'build/intsafe_workaround.h' ],
-            },
           },
           'link_settings': {
             'libraries': [
               '-limm32.lib',
               '-ld2d1.lib',
               '-ldwmapi.lib',
               '-loleacc.lib',
             ],
           },
         },{  # OS!="win"
@@ skipping 250 matching lines @@
               'xcode_settings': {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
               },
             }],
           ],
         },
       ],
     }],
   ],
 }