Remove use of SkRefCnt_SafeAssign.

Update pointer to SkRefCnt fields which require it to sk_sp.

Test: refactoring CL. Existing unit tests still pass.
Change-Id: I4f3eb790ee67c09746708458c4492569b64cc58f
diff --git a/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp b/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
index c195a8e..85fdc103 100644
--- a/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
+++ b/libs/hwui/pipeline/skia/RenderNodeDrawable.cpp
@@ -156,10 +156,10 @@
                             SkPaint* paint) {
     paint->setFilterQuality(kLow_SkFilterQuality);
     if (alphaMultiplier < 1.0f || properties.alpha() < 255 ||
-        properties.xferMode() != SkBlendMode::kSrcOver || properties.colorFilter() != nullptr) {
+        properties.xferMode() != SkBlendMode::kSrcOver || properties.getColorFilter() != nullptr) {
         paint->setAlpha(properties.alpha() * alphaMultiplier);
         paint->setBlendMode(properties.xferMode());
-        paint->setColorFilter(sk_ref_sp(properties.colorFilter()));
+        paint->setColorFilter(sk_ref_sp(properties.getColorFilter()));
         return true;
     }
     return false;