GitLab

This CL runs SitePerProcessHitTestBrowserTest,
SitePerProcessHighDPIHitTestBrowserTest,
SitePerProcessNonIntegerScaleFactorHitTestBrowserTest,
SitePerProcessInternalsHitTestBrowserTest,
SitePerProcessMouseWheelHitTestBrowserTest,
SitePerProcessGestureHitTestBrowserTest with
--use-viz-hit-test-draw-quad flag turned on.

1. Updated SetWebEventPositions and UpdateEventRootLocation to compute
the correct screen coordiantes.

2. Added two TODOs for Viz hit-test in
MouseClickWithNonIntegerScaleFactor.MouseClickWithNonIntegerScaleFactor
and SitePerProcessHitTestBrowserTest.SurfaceHitTestPointerEventsNone.

Bug: 810121
Change-Id: I8b4d470fe76a8cbb489151fe4c113462b8982243
Reviewed-on: https://chromium-review.googlesource.com/919260Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Ria Jiang <riajiang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538917}