1 Test that pointerlockchange event is dispatched when lock is lost.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS window.testRunner is defined.
8 PASS onpointerlockchange received after: Lock targetDiv1.
9 PASS document.pointerLockElement is targetDiv1
10 Host initiated unlock.
11 PASS onpointerlockchange received after: Host initiated unlock.
12 PASS document.pointerLockElement is null
13 PASS successfullyParsed is true