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Test Info:
- Manifest: dom/base/test/chrome/chrome.toml
<?xml version="1.0"?>
                 type="text/css"?>
<!--
-->
  <!-- test results are displayed in the html:body -->
  <iframe onload="startTests()" id="frame" src="http://example.com/chrome/dom/base/test/chrome/frame_custom_element_content.html"></iframe>
  </body>
  <!-- test code goes here -->
  <script type="application/javascript"><![CDATA[
  var connectedCallbackCount = 0;
  function startTests() {
    var frame = $("frame");
    class XFoo extends frame.contentWindow.HTMLElement {};
    frame.contentWindow.customElements.define("x-foo", XFoo);
    var elem = new XFoo();
    is(elem.tagName, "X-FOO", "Constructor should create an x-foo element.");
    class XBar extends frame.contentWindow.HTMLElement {
      constructor() {
        super();
        this.magicNumber = 42;
      }
      connectedCallback() {
        connectedCallbackCount++;
        // Callback should be called only once by element created in content.
        is(connectedCallbackCount, 1, "Connected callback called, should be called once in test.");
        is(this.magicNumber, 42, "Callback should be able to see the custom prototype.");
      }
    };
    frame.contentWindow.customElements.define("x-bar", XBar);
    is(connectedCallbackCount, 1, "Connected callback should be called by element created in content.");
    var element = frame.contentDocument.createElement("x-bar");
    is(element.magicNumber, 42, "Should be able to see the custom prototype on created element.");
  }
  ]]></script>
</window>