ymer_app_layout/PerformanceMark-class.html">PerformanceMark</a></li>
            <li><a href="polymer_app_layout/PerformanceMeasure-class.html">PerformanceMeasure</a></li>
            <li><a href="polymer_app_layout/PerformanceResourceTiming-class.html">PerformanceResourceTiming</a></li>
        </ul></dd>
        </dl>
    </section>




    <section class="summary" id="instance-properties">
        <h2>Properties</h2>

        <dl class="properties">
            <dt id="duration" class="property">
       