Fix uninitialized member in TouchEvent.

One ctor was leaving the hovering_ member in a non-deterministic state.

BUG=855979
TBR=nzolghadr@chromium.org

Change-Id: I4b49426d08940cd24bb31039bfa5a75b14aadb6d
Reviewed-on: https://chromium-review.googlesource.com/1116788
Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570751}
1 file changed