Revert of more shader-->sp conversions (patchset #5 id:80001 of https://codereview.chromium.org/1789633002/ )

Reason for revert:
seems to have changed pictureshadertile

Original issue's description:
> more shader-->sp conversions
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1789633002
>
> Committed: https://skia.googlesource.com/skia/+/ce563cdd48ec7ce4e0420dd88760df9be9dba50c

TBR=fmalita@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1790353002
diff --git a/tests/PaintImageFilterTest.cpp b/tests/PaintImageFilterTest.cpp
index f1c0c2e..b71fe47 100644
--- a/tests/PaintImageFilterTest.cpp
+++ b/tests/PaintImageFilterTest.cpp
@@ -30,9 +30,10 @@
     SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
     SkScalar radius = SkIntToScalar(5);
 
-    SkPaint gradientPaint;
-    gradientPaint.setShader(SkGradientShader::MakeRadial(
+    SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial(
         center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
+    SkPaint gradientPaint;
+    gradientPaint.setShader(s);
 
     // Test using the image filter
     {
@@ -76,9 +77,10 @@
     SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
     SkScalar radius = SkIntToScalar(5);
 
-    SkPaint gradientPaint;
-    gradientPaint.setShader(SkGradientShader::MakeRadial(
+    SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial(
         center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
+    SkPaint gradientPaint;
+    gradientPaint.setShader(s);
 
     // Test using the image filter
     {