Update SkMatrixImageFilter to sk_sp

gm/matriximagefilter.cpp

Index: gm/matriximagefilter.cpp
diff --git a/gm/matriximagefilter.cpp b/gm/matriximagefilter.cpp
index 3b4c0f6ecb47c3b3e4da4b5220c5595502c2af8f..ef16ea4bdc7b76a591b1b7aec6fb0de6b77b9894 100644
--- a/gm/matriximagefilter.cpp
+++ b/gm/matriximagefilter.cpp
@@ -11,10 +11,8 @@
 
 static void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap,
                  const SkMatrix& matrix, SkFilterQuality filter) {
-        SkAutoTUnref<SkImageFilter> imageFilter(
-            SkImageFilter::CreateMatrixFilter(matrix, filter));
         SkPaint paint;
-        paint.setImageFilter(imageFilter.get());
+        paint.setImageFilter(SkImageFilter::MakeMatrixFilter(matrix, filter, nullptr));
         canvas->saveLayer(&rect, &paint);
         canvas->drawBitmap(bitmap, 0, 0);
         canvas->restore();