Added eventSender support for touches causing scroll when uncanceled.
We need layout tests for verifying that pointercancel events are fired
correctly on touch. WebTouchEvent.causesScrollingIfUncanceled, among
other things, control the firing of pointercancel events. This CL adds
eventSenter support for sending touchMoves with the field
causesScrollingIfUncanceled set to true.
See crrev.com/
1214953004 for the followup blink CL containing the layout
test.
BUG=476576
Review URL: https://codereview.chromium.org/
1213663003
Cr-Commit-Position: refs/heads/master@{#336881}