Revert[2] of expand unitests for color4f

src/core/SkColor.cpp

Index: src/core/SkColor.cpp
diff --git a/src/core/SkColor.cpp b/src/core/SkColor.cpp
index c9f4a1433dfd9a856c5d7f6bed4725147e0bde89..1794cd7d909c68a23f102d25cfe9e4c73ed0ed2f 100644
--- a/src/core/SkColor.cpp
+++ b/src/core/SkColor.cpp
@@ -104,9 +104,10 @@ SkColor SkHSVToColor(U8CPU a, const SkScalar hsv[3]) {
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 #include "SkNx.h"
 
-SkColor4f SkColor4f::Pin(float a, float r, float g, float b) {
-    SkColor4f c4;
-    Sk4f::Min(Sk4f::Max(Sk4f(a, r, g, b), Sk4f(0)), Sk4f(1)).store(c4.vec());
+SkPM4f SkPM4f::FromPMColor(SkPMColor c) {
+    Sk4f value = SkNx_cast<float>(Sk4b::Load((const uint8_t*)&c));
+    SkPM4f c4;
+    (value * Sk4f(1.0f / 255)).store(c4.fVec);
     return c4;
 }
 
@@ -117,6 +118,12 @@ SkColor4f SkColor4f::FromColor(SkColor c) {
     return c4;
 }
 
+SkColor4f SkColor4f::Pin(float a, float r, float g, float b) {
+    SkColor4f c4;
+    Sk4f::Min(Sk4f::Max(Sk4f(a, r, g, b), Sk4f(0)), Sk4f(1)).store(c4.vec());
+    return c4;
+}
+
 SkPM4f SkColor4f::premul() const {
     auto src = Sk4f::Load(this->pin().vec());
     float srcAlpha = src.kth<0>();  // need the pinned version of our alpha