2 Taps at a point that becomes a scrollbar (i.e. hit test with innerNode=null) during the tap and verifies we don't crash.
4 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 Test case: Tap on consistent scrollbar
10 Test case: Add scrollbars during mousemove
12 Received mousemove in child frame
13 Adding scrollbars to iframe
14 Received mousedown in child frame
15 Received mouseup in child frame
16 Received click in child frame
18 Test case: Add scrollbars during mousedown
20 Received mousemove in child frame
21 Received mousedown in child frame
22 Adding scrollbars to iframe
23 Received mouseup in child frame
24 Received click in child frame
26 Test case: Add scrollbars during mouseup
28 Received mousemove in child frame
29 Received mousedown in child frame
30 Received mouseup in child frame
31 Adding scrollbars to iframe
32 Received click in child frame
34 PASS successfullyParsed is true