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}
3 files changed