The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a1215009f69ac267d13b072cc2d4c9cda7155fee

commit a1215009f69ac267d13b072cc2d4c9cda7155fee
Author: mthiesse <mthiesse@chromium.org>
Date: Thu May 04 23:29:22 2017

WebVR: Don't crash when receiving null image from rendering context.

Not sure why/how this happens, but I was seeing this infrequently on  https://with.in/watch/under-neon-lights/

BUG= 718501 

Review-Url: https://codereview.chromium.org/2862883002
Cr-Commit-Position: refs/heads/master@{#469517}

[modify] https://crrev.com/a1215009f69ac267d13b072cc2d4c9cda7155fee/third_party/WebKit/Source/modules/vr/VRDisplay.cpp

Your change meets the bar and is auto-approved for M59. Please go ahead and merge the CL to branch 3071 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), gkihumba@(ChromeOS), Abdul Syed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2ce7c2c63299607f9f56302e7a12c4be34a0fa32

commit 2ce7c2c63299607f9f56302e7a12c4be34a0fa32
Author: Michael Thiessen <mthiesse@google.com>
Date: Mon May 08 15:08:27 2017

WebVR: Don't crash when receiving null image from rendering context.

Not sure why/how this happens, but I was seeing this infrequently on  https://with.in/watch/under-neon-lights/

BUG= 718501 

Review-Url: https://codereview.chromium.org/2862883002
Cr-Commit-Position: refs/heads/master@{#469517}
(cherry picked from commit a1215009f69ac267d13b072cc2d4c9cda7155fee)

Review-Url: https://codereview.chromium.org/2870553003 .
Cr-Commit-Position: refs/branch-heads/3071@{#446}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/2ce7c2c63299607f9f56302e7a12c4be34a0fa32/third_party/WebKit/Source/modules/vr/VRDisplay.cpp

That looks like a tricky one. Thanks for the fix guys!