Put chromoting isolate targets under chromoting_swarm_tests=1 GYP variable.

chrome/test/media_router/media_router_tests.gypi

+# Copyright 2015 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': {
+    'media_router_integration_test_resources': [
+      'resources/basic_test.html',
+      'resources/common.js'
+    ],
+  }, # end of variables
+  'targets': [
+    {
+      'target_name': 'media_router_integration_test_files',
+      'type': 'none',
+      'variables': {
+        'output_dir': '<(PRODUCT_DIR)/media_router/browser_test_resources',
+        'resource_files': [
+          '<@(media_router_integration_test_resources)',
+        ]
+      },
+      'copies': [
+        {
+          'destination': '<(output_dir)',
+          'files': [
+            '<@(resource_files)',
+          ],
+        },
+      ],
+    },  # end of target 'media_router_integration_test_files'
+  ],  # end of targets
+}