title: Page title is not changed by history.pushState
body: <p>I've just opened a blank HTML page with some little amount of base tags (like html, body, head, etc) in Google Chrome, and tried to execute the following command in console:</p>
  
  <pre><code>history.pushState(null, 'my test title', '/test/url');
  </code></pre>
  
  <p>History events work fine, but the page title stays unchanged. Is it OK? Should I change it manually every time? If I should, why there is such parameter in pushState() method like title?</p>