The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1ce01d74264f25346da3b01f9fc3accaa91a1dd7

commit 1ce01d74264f25346da3b01f9fc3accaa91a1dd7
Author: Michael Thiessen <mthiesse@chromium.org>
Date: Sat Jul 08 02:10:15 2017

VR: Fix double-queueing of Choreographer callbacks when skipping VR entry screens

Moves pausing of the vsync estimator into onPause rather than onStop.

Bug:  740161 
Change-Id: I4a8c3b9ecfd60bc43ed3499761cc6b0391f47082
Reviewed-on: https://chromium-review.googlesource.com/563858
Reviewed-by: Biao She <bshe@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485129}
[modify] https://crrev.com/1ce01d74264f25346da3b01f9fc3accaa91a1dd7/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

I'm still seeing this, just less frequently. Stdout: https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FAndroid_VR_Tests%2F9344%2F%2B%2Frecipes%2Fsteps%2Fchrome_public_test_vr_apk-nonddready-cardboard-current-lollipop_on_Android%2F0%2Fstdout

Failed build: https://build.chromium.org/p/chromium.fyi/builders/Android%20VR%20Tests/builds/9344

Different issue, but the fix is here: https://chromium-review.googlesource.com/c/568458/