Backporting JSONValues from protocol::Values

third_party/WebKit/Source/platform/graphics/LoggingCanvas.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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LoggingCanvas_h
 #define LoggingCanvas_h
 
 #include "platform/JSONValues.h"
 #include "platform/graphics/InterceptingCanvas.h"
+#include <memory>
 
 namespace blink {
 
 class LoggingCanvas : public InterceptingCanvasBase {
 public:
     LoggingCanvas(int width, int height);
-    PassRefPtr<JSONArray> log();
+
+    // Returns a snapshot of the current log data.
+    std::unique_ptr<JSONArray> log();
 
     void onDrawPaint(const SkPaint&) override;
     void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
     void onDrawRect(const SkRect&, const SkPaint&) override;
     void onDrawOval(const SkRect&, const SkPaint&) override;
     void onDrawRRect(const SkRRect&, const SkPaint&) override;
     void onDrawPath(const SkPath&, const SkPaint&) override;
     void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
     void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*, SrcRectConstraint) override;
     void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst, const SkPaint*) override;
@@ skipping 15 matching lines @@
     virtual void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*);
     void didSetMatrix(const SkMatrix&) override;
     void didConcat(const SkMatrix&) override;
     void willSave() override;
     SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
     void willRestore() override;
 
 private:
     friend class AutoLogger;
 
-    RefPtr<JSONArray> m_log;
+    std::unique_ptr<JSONArray> m_log;
 };
 
 #ifndef NDEBUG
 String pictureAsDebugString(const SkPicture*);
 void showSkPicture(const SkPicture*);
 #endif
 
 } // namespace blink
 
 #endif // LoggingCanvas_h