Bug 849009 followup, add missing files from Add-on SDK uplift in 0745394ef7b1, r=KWierso
Bug 804944, patch 2:  Also condition @-moz-keyframes parsing on the animations preference.  r=bzbarsky
Bug 849263:  Make OverflowChangedTracker actually sort by depth in the tree where it intended to.  r=roc
Backout changeset 6ff3de859ce3 (bug 804944), which depended on an unlanded patch that I currently have tagged for bug 784461.