Bug 1058919 - Make regions and matrix printable. r=botond

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extra : rebase_source : d881d86afbba64ba989c66fe98de89ef0a381dba
Bug 1010584 - Cull in ContainerLayerComposite. r=mwoodrow

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extra : rebase_source : ed9457906ac6d69bf563ddadff1599aea8964849