vr: Amend OWNERs and remove vr_shell noparent

BUG=

Change-Id: I71fd5ed6623499c55332e3ccc3372123768d37c8
Reviewed-on: https://chromium-review.googlesource.com/579689Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488325}

chrome/browser/android/vr_shell/OWNERS

-set noparent
-
 bajones@chromium.org
 bshe@chromium.org
 girard@chromium.org
 mthiesse@chromium.org
 cjgrant@chromium.org
 vollick@chromium.org
+asimjour@chromium.org
+tiborg@chromium.org
+ymalik@chromium.org
 
 # COMPONENT: UI>Browser>VR

chrome/browser/vr/OWNERS

@@ -3,5 +3,8 @@ bshe@chromium.org
 mthiesse@chromium.org
 cjgrant@chromium.org
 vollick@chromium.org
+asimjour@chromium.org
+tiborg@chromium.org
+ymalik@chromium.org
 
 # COMPONENT: UI>Browser>VR