GitLab

Exo window uses custom event targter so we need to explicitly set
the default targeter to correctly handle input events.

Bug: 925769
Test: manually
Change-Id: Ia596bd4524d2a3e8dae86e8be34821822edf9626
Reviewed-on: https://chromium-review.googlesource.com/c/1488485Reviewed-by: Mitsuru Oshima (Slow) <oshima@chromium.org>
Commit-Queue: Ryo Hashimoto <hashimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635824}