Backporting JSONValues from protocol::Values

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

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 184 matching lines @@
 
     // For hosting this GraphicsLayer in a native layer hierarchy.
     WebLayer* platformLayer() const;
 
     int paintCount() const { return m_paintCount; }
 
     // Return a string with a human readable form of the layer tree, If debug is true
     // pointers for the layers and timing data will be included in the returned string.
     String layerTreeAsText(LayerTreeFlags = LayerTreeNormal) const;
 
-    PassRefPtr<JSONObject> layerTreeAsJSON(LayerTreeFlags) const;
+    std::unique_ptr<JSONObject> layerTreeAsJSON(LayerTreeFlags) const;
 
     void setTracksPaintInvalidations(bool);
     bool isTrackingOrCheckingPaintInvalidations() const
     {
 #if DCHECK_IS_ON()
         if (RuntimeEnabledFeatures::slimmingPaintUnderInvalidationCheckingEnabled())
             return true;
 #endif
         return m_isTrackingPaintInvalidations;
     }
@@ skipping 73 matching lines @@
     void updateChildList();
     void updateLayerIsDrawable();
     void updateContentsRect();
 
     void setContentsTo(WebLayer*);
     void setupContentsLayer(WebLayer*);
     void clearContentsLayerIfUnregistered();
     WebLayer* contentsLayerIfRegistered();
 
     typedef HashMap<int, int> RenderingContextMap;
-    PassRefPtr<JSONObject> layerTreeAsJSONInternal(LayerTreeFlags, RenderingContextMap&) const;
+    std::unique_ptr<JSONObject> layerTreeAsJSONInternal(LayerTreeFlags, RenderingContextMap&) const;
 
 #if DCHECK_IS_ON()
     PassRefPtr<SkPicture> capturePicture();
     void checkPaintUnderInvalidations(const SkPicture&);
 #endif
 
     GraphicsLayerClient* m_client;
 
     // Offset from the owning layoutObject
     DoubleSize m_offsetFromLayoutObject;
@@ skipping 69 matching lines @@
 };
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the blink namespace for ease of invocation from gdb.
 void PLATFORM_EXPORT showGraphicsLayerTree(const blink::GraphicsLayer*);
 #endif
 
 #endif // GraphicsLayer_h