Disable pyauto for Win64 build

chrome/chrome_tests.gypi

 # Copyright 2013 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 2682 matching lines @@
                   },
                 },
               },
             }],
           ],
         },
       ]},  # 'targets'
     ],
     # If you change this condition, make sure you also change it in all.gyp
     # for the chromium_builder_qa target.
-    ['enable_automation==1 and (OS=="mac" or OS=="win" or (os_posix==1 and target_arch==python_arch))', {
+    ['enable_automation==1 and (OS=="mac" or ((OS=="win" or os_posix==1) and target_arch==python_arch))', {
       'targets': [
         {
           # Documentation: http://dev.chromium.org/developers/testing/pyauto
           'target_name': 'pyautolib',
           'type': 'loadable_module',
           'product_prefix': '_',
           'dependencies': [
             'chrome',
             'chrome_resources.gyp:chrome_resources',
             'chrome_resources.gyp:chrome_strings',
@@ skipping 430 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }