Hit-test related site-per-process-browsertests with Viz hit-test.

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}

testing/buildbot/filters/viz.content_browsertests.filter

@@ -38,27 +38,27 @@
 -SitePerProcessBrowserTest.TwoSubframesCreatePopupMenuWidgetsSimultaneously
 -SitePerProcessBrowserTest.ViewBoundsInNestedFrameTest
 -SitePerProcessBrowserTest.PhysicalBackingSizeTest
--SitePerProcessHitTestBrowserTest.AsynchronousHitTestChildTimeout
--SitePerProcessHitTestBrowserTest.CancelWheelScrollBubblingOnWheelTargetDeletion
--SitePerProcessHitTestBrowserTest.CreateContextMenuTest
--SitePerProcessHitTestBrowserTest.CrossProcessMouseCapture
--SitePerProcessHitTestBrowserTest.CrossProcessMouseEnterAndLeaveTest
--SitePerProcessHitTestBrowserTest.CursorUpdateReceivedFromCrossSiteIframe
--SitePerProcessHitTestBrowserTest.InputEventRouterGesturePreventDefaultTargetMapTest
--SitePerProcessHitTestBrowserTest.InputEventRouterGestureTargetMapTest
--SitePerProcessHitTestBrowserTest.InputEventRouterTouchpadGestureTargetTest
--SitePerProcessHitTestBrowserTest.InputEventRouterWheelCoalesceTest
--SitePerProcessHitTestBrowserTest.HitTestLayerSquashing
--SitePerProcessHitTestBrowserTest.HitTestNestedFrames
--SitePerProcessHitTestBrowserTest.HitTestWatermark
--SitePerProcessHitTestBrowserTest.NestedSurfaceHitTestTest
--SitePerProcessHitTestBrowserTest.OverlapSurfaceHitTestTest
--SitePerProcessHitTestBrowserTest.PopupMenuTest
--SitePerProcessHitTestBrowserTest.RootConsumesScrollDuringOverscrollGesture
--SitePerProcessHitTestBrowserTest.ScrollEventToOOPIF
--SitePerProcessHitTestBrowserTest.SubframeTouchEventRouting
--SitePerProcessHitTestBrowserTest.SurfaceHitTestPointerEventsNone
--SitePerProcessHitTestBrowserTest.SurfaceHitTestTest
+-SitePerProcessHitTestBrowserTest.AsynchronousHitTestChildTimeout*
+-SitePerProcessHitTestBrowserTest.CancelWheelScrollBubblingOnWheelTargetDeletion*
+-SitePerProcessHitTestBrowserTest.CreateContextMenuTest*
+-SitePerProcessHitTestBrowserTest.CrossProcessMouseCapture*
+-SitePerProcessHitTestBrowserTest.CrossProcessMouseEnterAndLeaveTest*
+-SitePerProcessHitTestBrowserTest.CursorUpdateReceivedFromCrossSiteIframe*
+-SitePerProcessHitTestBrowserTest.InputEventRouterGesturePreventDefaultTargetMapTest*
+-SitePerProcessHitTestBrowserTest.InputEventRouterGestureTargetMapTest*
+-SitePerProcessHitTestBrowserTest.InputEventRouterTouchpadGestureTargetTest*
+-SitePerProcessHitTestBrowserTest.InputEventRouterWheelCoalesceTest*
+-SitePerProcessHitTestBrowserTest.HitTestLayerSquashing*
+-SitePerProcessHitTestBrowserTest.HitTestNestedFrames*
+-SitePerProcessHitTestBrowserTest.HitTestWatermark*
+-SitePerProcessHitTestBrowserTest.NestedSurfaceHitTestTest*
+-SitePerProcessHitTestBrowserTest.OverlapSurfaceHitTestTest*
+-SitePerProcessHitTestBrowserTest.PopupMenuTest*
+-SitePerProcessHitTestBrowserTest.RootConsumesScrollDuringOverscrollGesture*
+-SitePerProcessHitTestBrowserTest.ScrollEventToOOPIF*
+-SitePerProcessHitTestBrowserTest.SubframeTouchEventRouting*
+-SitePerProcessHitTestBrowserTest.SurfaceHitTestPointerEventsNone*
+-SitePerProcessHitTestBrowserTest.SurfaceHitTestTest*
 
 # Copy Surface timing out http://crbug.com/785257
 -GLAndSoftwareCompositing/CompositingRenderWidgetHostViewBrowserTest.*