Change SkColor4f to RGBA channel order

src/core/SkPixmap.cpp

Index: src/core/SkPixmap.cpp
diff --git a/src/core/SkPixmap.cpp b/src/core/SkPixmap.cpp
index 887fdb46e9518bdbd698862cc01739d4389cad94..77498396b018eb1c9a8c21fc9b6e7f1c2bcb7d74 100644
--- a/src/core/SkPixmap.cpp
+++ b/src/core/SkPixmap.cpp
@@ -228,10 +228,7 @@ bool SkPixmap::erase(const SkColor4f& origColor, const SkIRect* subset) const {
     const SkColor4f color = origColor.pin();
 
     if (kRGBA_F16_SkColorType != pm.colorType()) {
-        Sk4f c4 = Sk4f::Load(color.vec());
-        SkColor c;
-        SkNx_cast<uint8_t>(c4 * Sk4f(255) + Sk4f(0.5f)).store(&c);
-        return pm.erase(c);
+        return pm.erase(color.toSkColor());
     }
 
     const uint64_t half4 = color.premul().toF16();