With crrev.com/c/1147218, we should no longer be sharing code, though this is the long term goal. I've reworked this bug to capture the new next step.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b07132cfd85f20d88ecc4d276f2dbce7870e9126

commit b07132cfd85f20d88ecc4d276f2dbce7870e9126
Author: Ian Vollick <vollick@chromium.org>
Date: Mon Jul 23 22:27:27 2018

[ar] Avoid using VR UI code for AR rendering

While VR and AR may one day be able to share code, this will complicate
our lives in the short term. With this change I've added an ArRenderer
to handle the modest GL work that's required by AR.

Bug: 838013
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:linux_vr;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Ibdbcb5729a7f70f0c63ef4c72ffd2804ed351eab
Reviewed-on: https://chromium-review.googlesource.com/1147218
Commit-Queue: Ian Vollick <vollick@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Reviewed-by: Bill Orr <billorr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577301}
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/BUILD.gn
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/arcore_device/ar_image_transport.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/arcore_device/ar_image_transport.h
[add] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/arcore_device/ar_renderer.cc
[add] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/arcore_device/ar_renderer.h
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/android/vr/vr_shell_gl.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/BUILD.gn
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/elements/content_element.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/ui.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/ui.h
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/ui_interface.h
[add] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/vr_geometry_util.cc
[add] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/vr_geometry_util.h
[rename] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/vr_geometry_util_unittest.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/vr_gl_util.cc
[modify] https://crrev.com/b07132cfd85f20d88ecc4d276f2dbce7870e9126/chrome/browser/vr/vr_gl_util.h

Removing Blink>WebVR component and assigning to Blink>WebXR 

Removing Blink>WebVR component and assigning to Blink>WebXR