return pictures as sk_sp

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1811703002

Review URL: https://codereview.chromium.org/1811703002
diff --git a/tests/PictureShaderTest.cpp b/tests/PictureShaderTest.cpp
index 4da7aab..78d59af 100644
--- a/tests/PictureShaderTest.cpp
+++ b/tests/PictureShaderTest.cpp
@@ -31,8 +31,8 @@
 
     SkPictureRecorder factory;
     factory.beginRecording(0, 0, nullptr, 0);
-    sk_sp<SkPicture> picture(factory.endRecording());
-    paint.setShader(SkShader::MakePictureShader(std::move(picture), SkShader::kClamp_TileMode,
+    paint.setShader(SkShader::MakePictureShader(factory.finishRecordingAsPicture(),
+                                                SkShader::kClamp_TileMode,
                                                 SkShader::kClamp_TileMode, nullptr, nullptr));
 
     canvas.drawRect(SkRect::MakeWH(1,1), paint);