Add bsheedy as VR browser test owner

Adds bsheedy to chrome/browser/vr/OWNERS for the VR browser test-related
code in chrome/browser/vr/ and chrome/browser/vr/test.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_vr;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I9ac6b819f9551c40b37e559184ea9bf9dab85df8
Reviewed-on: https://chromium-review.googlesource.com/981513Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546135}

chrome/browser/vr/OWNERS

@@ -10,4 +10,7 @@ ymalik@chromium.org
 # WebVR-related
 klausw@chromium.org
 
+# Browser Test-related
+bsheedy@chromium.org
+
 # COMPONENT: UI>Browser>VR