Setup JS unittests for Chromoting

chrome/js_unittest_vars.gypi

Index: chrome/js_unittest_vars.gypi
diff --git a/chrome/js_unittest_vars.gypi b/chrome/js_unittest_vars.gypi
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+# Copyright (c) 2011 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' : {
+    'gypv8sh': '<(DEPTH)/tools/gypv8sh.py',
+    'js2gtest': '<(DEPTH)/chrome/test/base/js2gtest.js',
+    'mock_js': '<(DEPTH)/chrome/third_party/mock4js/mock4js.js',
+    'test_api_js': '<(DEPTH)/chrome/test/data/webui/test_api.js',
+  },
+}