Chris Craik bb615a6ffb Clear root level reorder lists to prevent accessing stale DisplayLists
bug:12581401

Adds temporary logging which should log/crash earlier on incorrectly
reordering hierarchies.

Change-Id: Iee00940718c3cc868161e754aff93cd3b2747094
2014-01-24 15:01:40 -08:00
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