Revert of switch colorfilters to sk_sp

gm/colormatrix.cpp

Index: gm/colormatrix.cpp
diff --git a/gm/colormatrix.cpp b/gm/colormatrix.cpp
index 8ac15dba8ea9073072232de6a3d6f940ae23bb0b..de80ebb64b3b8cc9ffe43cbffe42ebc3affe1a95 100644
--- a/gm/colormatrix.cpp
+++ b/gm/colormatrix.cpp
@@ -14,11 +14,11 @@
 #define HEIGHT 500
 
 static void set_color_matrix(SkPaint* paint, const SkColorMatrix& matrix) {
-    paint->setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(matrix.fMat));
+    paint->setColorFilter(SkColorMatrixFilter::Create(matrix))->unref();
 }
 
 static void set_array(SkPaint* paint, const SkScalar array[]) {
-    paint->setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(array));
+    paint->setColorFilter(SkColorMatrixFilter::Create(array))->unref();
 }
 
 class ColorMatrixGM : public skiagm::GM {