All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=882652

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=516a5943e07e52b2bc03e0a48f1493a93d3cd1f3cb913f4c3dfa3d1c057c1c0c


Bot(s) for this bug's original alert(s):

pixel_2_xl

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/32e8a09b7ae6015586572bcfc654cdec246efd59

commit 32e8a09b7ae6015586572bcfc654cdec246efd59
Author: Aldo Culquicondor <acondor@chromium.org>
Date: Thu Sep 13 18:38:25 2018

VR: Fix PostSubmitDrawOnGpu traces for UI frames

The tracing was accidentaly switched to WebXR frames on
https://crrev.com/c/1191864, introducing a regression in GPU memory.

Also doing minor clean ups.

Bug:  882652 
Change-Id: I6ff946c91d847508333f244a9c2cb9bb00e4ac90
Reviewed-on: https://chromium-review.googlesource.com/1224655
Reviewed-by: Klaus Weidner <klausw@chromium.org>
Commit-Queue: Aldo Culquicondor <acondor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591083}
[modify] https://crrev.com/32e8a09b7ae6015586572bcfc654cdec246efd59/chrome/browser/android/vr/gvr_scheduler_delegate.cc