Add an API to set the ColorFilter on a Paint object.

sky/engine/core/painting/LayerDrawLooperBuilder.cpp

Index: sky/engine/core/painting/LayerDrawLooperBuilder.cpp
diff --git a/sky/engine/core/painting/LayerDrawLooperBuilder.cpp b/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
index 13072f77979104a4eeb87a3fed41145e53da8804..72598def2695ea0dfb08e0473b294776275a733c 100644
--- a/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
+++ b/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
@@ -33,13 +33,6 @@ void LayerDrawLooperBuilder::addLayerOnTop(
   paint->setPaint(*sk_paint);
   callback->handleEvent(paint.get());
   *sk_paint = paint->paint();
-
-  // TODO(mpcomplete): Remove this when we add color filter support to Paint's
-  // API.
-  SkColor skColor = sk_paint->getColor();
-  RefPtr<SkColorFilter> cf = adoptRef(
-      SkColorFilter::CreateModeFilter(skColor, SkXfermode::kSrcIn_Mode));
-  sk_paint->setColorFilter(cf.get());
 }
 
 } // namespace blink