Backporting JSONValues from protocol::Values

third_party/WebKit/Source/platform/graphics/PictureSnapshot.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 41 matching lines @@
         FloatPoint layerOffset;
         Vector<char> data;
     };
 
     static PassRefPtr<PictureSnapshot> load(const Vector<RefPtr<TilePictureStream>>&);
 
     PictureSnapshot(PassRefPtr<const SkPicture>);
 
     std::unique_ptr<Vector<char>> replay(unsigned fromStep = 0, unsigned toStep = 0, double scale = 1.0) const;
     std::unique_ptr<Timings> profile(unsigned minIterations, double minDuration, const FloatRect* clipRect) const;
-    PassRefPtr<JSONArray> snapshotCommandLog() const;
+    std::unique_ptr<JSONArray> snapshotCommandLog() const;
     bool isEmpty() const;
 
 private:
     std::unique_ptr<SkBitmap> createBitmap() const;
 
     RefPtr<const SkPicture> m_picture;
 };
 
 } // namespace blink
 
 #endif // PictureSnapshot_h