return pictures as sk_sp

src/core/SkPictureShader.cpp

Index: src/core/SkPictureShader.cpp
diff --git a/src/core/SkPictureShader.cpp b/src/core/SkPictureShader.cpp
index 30dc47ffd9ca4e279772604d6a06ddade82b6e91..76ecfc157029a51521f201b81787c1cba1cb56bd 100644
--- a/src/core/SkPictureShader.cpp
+++ b/src/core/SkPictureShader.cpp
@@ -133,7 +133,7 @@ SkFlattenable* SkPictureShader::CreateProc(SkReadBuffer& buffer) {
         // Old code always serialized the picture.  New code writes a 'true' first if it did.
         if (buffer.isVersionLT(SkReadBuffer::kPictureShaderHasPictureBool_Version) ||
             buffer.readBool()) {
-            picture.reset(SkPicture::CreateFromBuffer(buffer));
+            picture = SkPicture::MakeFromBuffer(buffer);
         }
     }
     return SkPictureShader::Make(picture, mx, my, &lm, &tile).release();