Convert chromedriver_unittests to run exclusively on Swarming

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': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 3112 matching lines @@
           ],
           'conditions': [
             ['use_x11==1', {
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
         {
+          'target_name': 'chromedriver_unittests_run',
+          'type': 'none',
+          'dependencies': [
+            'chromedriver_unittests',
+          ],
+          'conditions': [
+            ['use_x11 == 1', {
+              'dependencies': [
+                '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
+              ],
+            }],
+          ],
+          'includes': [
+            '../build/isolate.gypi',
+          ],
+          'sources': [
+            'chromedriver_unittests.isolate',
+          ],
+        },
+        {
           'target_name': 'interactive_ui_tests_run',
           'type': 'none',
           'dependencies': [
             'interactive_ui_tests',
           ],
           'conditions': [
             ['use_x11 == 1', {
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
@@ skipping 160 matching lines @@
             'utility',
           ],
           'sources': [
             'tools/service_discovery_sniffer/service_discovery_sniffer.cc',
             'tools/service_discovery_sniffer/service_discovery_sniffer.h',
           ],
         }]
     }],
   ],  # 'conditions'
 }