post_message_zero_sized_embed.html | Explore in Territory

<html>
<body>
<script>
/*
  This test page will attach an <embed> of size 0x0 and posts message to it to
  verify that the BrowserPlugin and MimeHandlerViewFrameContainer are created and
  the extension properly loaded. This is for a regression in slides/ pages where
  post messaging to <embed> should pop up print preview (only on Chrome). For
  for context see https://crbug.com/763812.
*/
  window.addEventListener('load', attachPdfAndPostMessage);
  window.addEventListener('message', onMessageReceived);

  function attachPdfAndPostMessage() {
    var e = document.createElement('embed');
    e.style.width = '0px';
    e.style.height = '0px';
    e.type = 'application/pdf';
    e.src = 'test.pdf';
    document.body.appendChild(e);
    e.postMessage({type: 'getSelectedText'});
  }

  function onMessageReceived(msg) {
    if (msg.data.type && msg.data.type === 'getSelectedTextReply')
      window.domAutomationController.send('POST_MESSAGE_OK');
  }

</script>
</body>
</html>

chromium/chrome/test/data/pdf/post_message_zero_sized_embed.html