Using an rtree in cc via http://crrev.com/1484163002 introduces an under-invalidation crash for:

virtual/spv2/fast/repaint/relative-positioned-movement-repaint.html

Sample stack trace:

https://storage.googleapis.com/chromium-layout-test-archives/linux_chromium_rel_ng/271475/layout-test-results/results.html

I am planning to land the change and follow up on this separately. Note the test in question is already in TestExpectations as:

 crbug.com/524236  virtual/spv2/fast/repaint/relative-positioned-movement-repaint.html [ Failure ]