Convert gcm_unit_tests to run exclusively on Swarming

google_apis/gcm/gcm.gyp

 # 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': {
     'chromium_code': 1,
   },
 
   'targets': [
@@ skipping 164 matching lines @@
         'engine/connection_handler_impl_unittest.cc',
         'engine/gcm_store_impl_unittest.cc',
         'engine/gservices_settings_unittest.cc',
         'engine/heartbeat_manager_unittest.cc',
         'engine/mcs_client_unittest.cc',
         'engine/registration_request_unittest.cc',
         'engine/unregistration_request_unittest.cc',
       ]
     },
   ],
+  'conditions': [
+    ['test_isolation_mode != "noop"', {
+      'targets': [
+        {
+          'target_name': 'gcm_unit_tests_run',
+          'type': 'none',
+          'dependencies': [
+            'gcm_unit_tests',
+          ],
+          'includes': [
+            '../../build/isolate.gypi',
+          ],
+          'sources': [
+            'gcm_unit_tests.isolate',
+          ],
+        },
+      ],
+    }],
+  ],
 }