Remove wow_helper from 64-bit builds

sandbox/win/sandbox_win.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'sandbox_windows_target': 0,
       'target_arch%': 'ia32',
     },
@@ skipping 165 matching lines @@
         '../testing/gtest.gyp:gtest',
         '../base/base.gyp:base',
         '../base/base.gyp:base_static',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
       ],
       'include_dirs': [
         '../..',
       ],
-      'copies': [
-        {
-          'destination': '<(PRODUCT_DIR)',
-          'files': [
-            'wow_helper/wow_helper.exe',
-            'wow_helper/wow_helper.pdb',
-          ],
-        },
-      ],
       'direct_dependent_settings': {
         'include_dirs': [
           'src',
           '../..',
         ],
       },
+      'target_conditions': [
+        ['target_arch=="ia32"', {
+          'copies': [
+            {
+              'destination': '<(PRODUCT_DIR)',
+              'files': [
+                'wow_helper/wow_helper.exe',
+                'wow_helper/wow_helper.pdb',
+              ],
+            },
+          ],
+        }],
+      ],
     },
     {
       'target_name': 'sbox_integration_tests',
       'type': 'executable',
       'dependencies': [
         'sandbox',
         '../testing/gtest.gyp:gtest',
       ],
       'sources': [
         'src/app_container_test.cc',
@@ skipping 140 matching lines @@
             ],
           },
           'defines': [
             '<@(nacl_win64_defines)',
           ]
         },
       ],
     }],
   ],
 }