GitLab

This will not change the functionality now, but will be used
when caption is moved to chrome for ARC++ apps.

BUG=762816

Change-Id: Ia25d13eba37b31677a265b9f3e8b09953a5dd8e5
Reviewed-on: https://chromium-review.googlesource.com/786545
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Reviewed-by: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520811}