Convert installer_util_unittests to run exclusively on Swarming

chrome/chrome_installer.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.
 
 {
   'variables': {
     'lastchange_path': '../build/util/LASTCHANGE',
     'libpeer_target_type%': 'static_library',
     'branding_dir': 'app/theme/<(branding_path_component)',
     'branding_dir_100': 'app/theme/default_100_percent/<(branding_path_component)',
@@ skipping 1050 matching lines @@
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
             'installer/gcapi_mac/gcapi_example_client.mm',
           ],
         },
       ],  # targets
     }],  # OS=="mac"
+    ['OS=="win" and test_isolation_mode != "noop"', {
+      'targets': [
+        {
+          'target_name': 'installer_util_unittests_run',
+          'type': 'none',
+          'dependencies': [
+            'installer_util_unittests',
+          ],
+          'includes': [
+            '../build/isolate.gypi',
+          ],
+          'sources': [
+            'installer_util_unittests.isolate',
+          ],
+        },
+      ],
+    }],
   ],
 }