GitLab

This change supports testing of Chrome on bots where we don't want to
install or use real OpenVR/SteamVR, in order to catch regressions in
Chrome.

This change also fixes a few issues found in preliminary tests.

BUG=780668

Change-Id: I885762e18b48961038454856743f9e7ae621001e
Reviewed-on: https://chromium-review.googlesource.com/795056
Commit-Queue: Bill Orr <billorr@chromium.org>
Reviewed-by: Klaus Weidner <klausw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523323}