Revert of Ignore pointer capture target while calculating click target (patchset #1 id:1 of https://codereview.chromium.org/2755753003/ )

Reason for revert:
Tentative revert. Hit testing broke in the following tests, and this patch looks the most closely related:

AccessibilityHitTestingBrowserTest.HitTestingInIframes
AccessibilityHitTestingBrowserTest.CachingAsyncHitTestingInIframes

Original issue's description:
> Ignore pointer capture target while calculating click target
>
> After https://codereview.chromium.org/2681443003
> it turns out we are creating some regressions.
> So this change keeps the essence of the original
> change for the purpose of keeping the metric but
> ignores the target that is calculated from the
> captured target and use the original click target
> regardless of the capturing.
>
> BUG=701599, 699933
>
> Review-Url: https://codereview.chromium.org/2755753003
> Cr-Commit-Position: refs/heads/master@{#458091}
> Committed: https://chromium.googlesource.com/chromium/src/+/ddb951c0cc2912acd57e4238677b82e6360ac1ad

TBR=dtapuska@chromium.org,mustaq@chromium.org,bokan@chromium.org,nzolghadr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=701599, 699933

Review-Url: https://codereview.chromium.org/2764813004
Cr-Commit-Position: refs/heads/master@{#458382}
3 files changed