[svg] Add support for mask color-interpolation

https://www.w3.org/TR/SVG11/painting.html#ColorInterpolationProperty

Bug: skia:10842
Change-Id: I3e97577ee257c9afe64d924c768c85badbfab07d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/354220
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Tyler Denniston <tdenniston@google.com>
diff --git a/modules/svg/include/SkSVGNode.h b/modules/svg/include/SkSVGNode.h
index c3d7d4e..263a037 100644
--- a/modules/svg/include/SkSVGNode.h
+++ b/modules/svg/include/SkSVGNode.h
@@ -104,6 +104,7 @@
     // inherited
     SVG_PRES_ATTR(ClipRule                 , SkSVGFillRule  , true)
     SVG_PRES_ATTR(Color                    , SkSVGColorType , true)
+    SVG_PRES_ATTR(ColorInterpolation       , SkSVGColorspace, true)
     SVG_PRES_ATTR(ColorInterpolationFilters, SkSVGColorspace, true)
     SVG_PRES_ATTR(FillRule                 , SkSVGFillRule  , true)
     SVG_PRES_ATTR(Fill                     , SkSVGPaint     , true)