Bug 907926 - Try avoid having multiple path objects around since this is slow with DrawTargetCairo. r=Bas
Bug 907926 - Avoid calling CurrentSurface when we can. r=Bas
Bug 911393 - Do not fallback for EXTEND_PAD when not needed. r=jrmuizel
Bug 917703 - Avoid copying to a sub image in CreateSamplingRestrictedDrawable if possible. r=roc
Bug 907926 - Enable Azure content for windows. r=nrc