title: Polymer paper-toolbar not working properly
body: <p>I have the following html code.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
      &lt;meta charset="UTF-8"&gt;
      &lt;title&gt;Hello&lt;/title&gt;
      &lt;script src="bower_components/webcomponentsjs/webcomponents.js"&gt;&lt;/script&gt;
      &lt;link href="bower_components/polymer/polymer.html" rel="import"&gt;
      &lt;link rel="import" href="bower_components/paper-toolbar/paper-toolbar.html"&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;paper-toolbar&gt;
          &lt;div class="title"&gt;Hello&lt;/div&gt;
      &lt;/paper-toolbar&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>And the page has a white gap between toolbar and the margin.</p>
  
  <p><a href="https://i.stack.imgur.com/fRUXa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fRUXa.png" alt="Output"></a></p>
  
  <p>How do I solve this?</p>