Bug 861280: use fake_N for uniqueId for video devices with no capability value we can use r=derf
Bug 870415 - Simplify invalidation of SVG in DoApplyRenderingChangeToTree. r=dholbert

--HG--
extra : rebase_source : c189f97241b6ef3534c1ddffc2bfc426f892d4a5
Bug 870443 - Add warning comment to DoApplyRenderingChangeToTree. r=dholbert

--HG--
extra : rebase_source : d6f6ba5f17f42f4606edc7c89f004d5782de447a