Turn styleWillChange |newStyle| into a reference

Source/core/rendering/RenderDeprecatedFlexibleBox.h

 /*
  * This file is part of the render object implementation for KHTML.
  *
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 20 matching lines @@
 
 class RenderDeprecatedFlexibleBox FINAL : public RenderBlock {
 public:
     RenderDeprecatedFlexibleBox(Element*);
     virtual ~RenderDeprecatedFlexibleBox();
 
     static RenderDeprecatedFlexibleBox* createAnonymous(Document*);
 
     virtual const char* renderName() const OVERRIDE;
 
-    virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle) OVERRIDE;
+    virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) OVERRIDE;
 
     virtual void layoutBlock(bool relayoutChildren) OVERRIDE;
     void layoutHorizontalBox(bool relayoutChildren);
     void layoutVerticalBox(bool relayoutChildren);
 
     virtual bool avoidsFloats() const OVERRIDE { return true; }
     virtual bool isDeprecatedFlexibleBox() const OVERRIDE { return true; }
     bool isStretchingChildren() const { return m_stretchingChildren; }
     virtual bool canCollapseAnonymousBlockChild() const OVERRIDE { return false; }
 
@@ skipping 14 matching lines @@
 private:
     void applyLineClamp(FlexBoxIterator&, bool relayoutChildren);
     void clearLineClamp();
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderDeprecatedFlexibleBox, isDeprecatedFlexibleBox());
 
 } // namespace WebCore
 
 #endif // RenderDeprecatedFlexibleBox_h