Use refs for GraphicsContext

third_party/WebKit/Source/core/paint/PaintLayerReflectionInfo.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 63 matching lines @@
     explicit PaintLayerReflectionInfo(LayoutBox&);
     void destroy();
 
     LayoutReplica* reflection() const { return m_reflection; }
     PaintLayer* reflectionLayer() const;
 
     bool isPaintingInsideReflection() const { return m_isPaintingInsideReflection; }
 
     void updateAfterStyleChange(const ComputedStyle* oldStyle);
 
-    void paint(GraphicsContext*, const PaintLayerPaintingInfo&, PaintLayerFlags);
+    void paint(GraphicsContext&, const PaintLayerPaintingInfo&, PaintLayerFlags);
 
 private:
     LayoutBox& box() { return *m_box; }
     const LayoutBox& box() const { return *m_box; }
 
     // The reflected box, ie the box with -webkit-box-reflect.
     LayoutBox* m_box;
 
     // The reflection object.
     // This LayoutObject is owned by PaintLayerReflectinInfo.
     LayoutReplica* m_reflection;
 
     // A state bit tracking if we are painting inside this replica.
     // This is done to avoid infinite recursion during painting while also
     // enabling nested reflection.
     unsigned m_isPaintingInsideReflection : 1;
 };
 
 } // namespace blink
 
 #endif // PaintLayerReflectinInfo_h