Update:  The current UX spec for v0 requires only a Back button (no refresh or forward).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/730e3cee9100751b3fb33c40f58c68e246e483be

commit 730e3cee9100751b3fb33c40f58c68e246e483be
Author: cjgrant <cjgrant@chromium.org>
Date: Thu Apr 27 14:57:50 2017

VR: Route hover and click events to UI elements.

This change maps VR controller input to non-content UI elements. The
content element is treated separately, so that it can handle scrolling
and fling-type input (these are currently not useful to other elements).

BUG= 715554 

Review-Url: https://codereview.chromium.org/2840183003
Cr-Commit-Position: refs/heads/master@{#467673}

[modify] https://crrev.com/730e3cee9100751b3fb33c40f58c68e246e483be/chrome/browser/android/vr_shell/ui_elements/ui_element.cc
[modify] https://crrev.com/730e3cee9100751b3fb33c40f58c68e246e483be/chrome/browser/android/vr_shell/ui_elements/ui_element.h
[modify] https://crrev.com/730e3cee9100751b3fb33c40f58c68e246e483be/chrome/browser/android/vr_shell/vr_shell_gl.cc
[modify] https://crrev.com/730e3cee9100751b3fb33c40f58c68e246e483be/chrome/browser/android/vr_shell/vr_shell_gl.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ee675c3aea2cccb7547b1b46b848374caef5f6be

commit ee675c3aea2cccb7547b1b46b848374caef5f6be
Author: mthiesse <mthiesse@chromium.org>
Date: Tue May 16 00:20:29 2017

VR Shell: Allow UI elements to determine hit testing.

BUG= 715554 

Review-Url: https://codereview.chromium.org/2878083003
Cr-Commit-Position: refs/heads/master@{#471954}

[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/close_button.cc
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/close_button.h
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/ui_element.cc
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/ui_element.h
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/url_bar.cc
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/ui_elements/url_bar.h
[modify] https://crrev.com/ee675c3aea2cccb7547b1b46b848374caef5f6be/chrome/browser/android/vr_shell/vr_shell_gl.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/febe5cb69cb8c121f2f95f3ec5fb81474958e992

commit febe5cb69cb8c121f2f95f3ec5fb81474958e992
Author: mthiesse <mthiesse@chromium.org>
Date: Tue May 16 20:55:34 2017

VR: Implement Omnibox input targeting.

Also updates some constants to match spec.

BUG= 715554 

Review-Url: https://codereview.chromium.org/2885433003
Cr-Commit-Position: refs/heads/master@{#472214}

[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/textures/loading_indicator_texture.cc
[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/textures/url_bar_texture.cc
[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/textures/url_bar_texture.h
[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/ui_elements/url_bar.cc
[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/ui_elements/url_bar.h
[modify] https://crrev.com/febe5cb69cb8c121f2f95f3ec5fb81474958e992/chrome/browser/android/vr_shell/ui_scene_manager.cc

This seems fixed. Please reopen if I've got that wrong.