SkImage now has makeShader to return sk_sp

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1785473002

Review URL: https://codereview.chromium.org/1785473002
diff --git a/tests/ImageNewShaderTest.cpp b/tests/ImageNewShaderTest.cpp
index 7b7d80e..0822dbd 100644
--- a/tests/ImageNewShaderTest.cpp
+++ b/tests/ImageNewShaderTest.cpp
@@ -45,9 +45,9 @@
     paintSource(sourceSurface);
 
     SkAutoTUnref<SkImage> sourceImage(sourceSurface->newImageSnapshot());
-    SkAutoTUnref<SkShader> sourceShader(sourceImage->newShader(
+    sk_sp<SkShader> sourceShader = sourceImage->makeShader(
             SkShader::kRepeat_TileMode,
-            SkShader::kRepeat_TileMode));
+            SkShader::kRepeat_TileMode);
 
     SkPaint paint;
     paint.setShader(sourceShader);
@@ -73,10 +73,10 @@
     SkMatrix matrix;
     matrix.setTranslate(SkIntToScalar(-1), SkIntToScalar(0));
 
-    SkAutoTUnref<SkShader> sourceShaderTranslated(sourceImage->newShader(
+    sk_sp<SkShader> sourceShaderTranslated = sourceImage->makeShader(
             SkShader::kRepeat_TileMode,
             SkShader::kRepeat_TileMode,
-            &matrix));
+            &matrix);
 
     destinationCanvas->clear(SK_ColorTRANSPARENT);