Bug 651021 - Make nsRenderingContext a stack class. r=jrmuizel
Bug 1091321, part 1 - Convert nsSVGClipPathFrame::ApplyClipOrPaintClipMask and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 2 - Convert nsSVGIntegrationUtils::PaintFramesWithEffects and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 3 - Convert nsFilterInstance::PaintFilteredFrame and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 4 - Convert nsISVGChildFrame::PaintSVG and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 5 - Convert nsSVGMarkerFrame::PaintMark and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 6 - Convert nsSVGUtils::PaintFrameWithEffects and related code from nsRenderingContext to gfxContext. r=longsonr
Bug 1091321, part 7 - Convert nsSVGFilterPaintCallback and related code from nsRenderingContext to gfxContext. r=longsonr