The new test added was reverted in https://crrev.com/ed9f590e796f4da44df280418d4eb3360def9486 due to underinvalidation differences between dcheck-enabled and release configuration differences on the bots.
WangXianzhu looked into this and is going to try to make underinvalidation enabled in release.
Goal is to re-add the test if that lands.
This is technically a regression but the rtree patch just exposed existing issues. https://crbug.com/642035 has some additional data and I think fixing it will fix this bug.
Comment 1 by bugdroid1@chromium.org
, Aug 30 2016