.numDisconnectedCallback after second setHTMLUnsafe.');
    assert_array_equals(myElement1.attributeChangedCalls, [],
      'myElement1.attributeChangedCalls after second setHTMLUnsafe.');
    assert_equals(myElement2.numConnectedCallback, 1,
      'myElement2.numConnectedCallback after second setHTMLUnsafe.');
    assert_equals(myElement2.numDisconnectedCallback, 0,
      'myElement2.numDisconnectedCallback after second setHTMLUnsafe.');
    assert_equals(JSON.stringify(myElement2.attributeChangedCalls),
 