Test iframe from different origin can not access webkitFullscreenElement.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS document.webkitFullscreenElement is targetDiv1
PASS document.webkitCurrentFullScreenElement is targetDiv1
PASS message is "inner-iframe.html document.webkitFullscreenElement = null"
PASS message is "inner-iframe.html document.webkitCurrentFullScreenElement = null"
PASS successfullyParsed is true
TEST COMPLETE