Make chrome_tests build on Win64

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
===================================================================
--- chrome/chrome_tests.gypi	(revision 183014)
+++ chrome/chrome_tests.gypi	(working copy)
@@ -80,6 +80,8 @@
           ],
         }],
       ],
+      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+      'msvs_disabled_warnings': [ 4267, ],
     },
     {
       'target_name': 'automated_ui_tests',
@@ -438,6 +440,8 @@
               ],
             },
           },
+          # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+          'msvs_disabled_warnings': [ 4267, ],
         }, { # else: OS != "win"
           'sources!': [
             'browser/ui/views/ssl_client_certificate_selector_browsertest.cc',
@@ -2098,6 +2102,8 @@
               },
             },
           },
+          # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+          'msvs_disabled_warnings': [ 4267, ],
         }],
         ['OS=="mac"', {
           'sources': [