Reland of "switch patheffects over to sk_sp (patchset #5 id:80001 of https://codereview.chromium.org/1813553005/ )"

This reverts commit f28ad894272018fd2855e3f77ea1236ea0cce1c0.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1813123003

TBR=

Review URL: https://codereview.chromium.org/1813123003
diff --git a/gm/strokes.cpp b/gm/strokes.cpp
index 261db9c..f64a876 100644
--- a/gm/strokes.cpp
+++ b/gm/strokes.cpp
@@ -128,7 +128,7 @@
             canvas->drawPath(fMoveZfPath, strokePaint);
             dashPaint = strokePaint;
             const SkScalar intervals[] = { 0, 10 };
-            dashPaint.setPathEffect(SkDashPathEffect::Create(intervals, 2, 0))->unref();
+            dashPaint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 0));
             SkPath fillPath;
             dashPaint.getFillPath(fDashedfPath, &fillPath);
             canvas->translate(0, 20);