1 Test iframe from different origin can not access pointerLockElement.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 PASS onpointerlockchange received after: Lock targetDiv1.
8 PASS document.pointerLockElement is targetDiv1
9 PASS message is "inner-iframe.html document.pointerLockElement = null"
10 PASS successfullyParsed is true