servo/servo — pull request #3706 by cgaebel (2014-10-16 21:47:39+00:00)
Title: Fix image_dynamic_remove reftest with incremental layout turned out

This also adds some extra debugging infrastructure which I found useful tracking
this bug down. A regression in the br reftests is also uncovered by this patch,
which I'll work on fixing next.

r? @pcwalton