[vr] Add e2e test for native UI

This should let us confirm our URL behavior on NTP and friends.
It also provides a convenient place to do more testing of
native UI in VR.

Bug: 738583
Change-Id: I983016bdcef62ab83e0265929e7b00230a1a661f
Reviewed-on: https://chromium-review.googlesource.com/571948
Commit-Queue: Ian Vollick <vollick@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487116}
7 files changed