Use references in RenderBlock and RenderBlockFlow methods

Source/core/rendering/RenderTable.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 293 matching lines @@
     virtual void updateLogicalWidth() override;
 
     LayoutUnit convertStyleLogicalWidthToComputedWidth(const Length& styleLogicalWidth, LayoutUnit availableWidth);
     LayoutUnit convertStyleLogicalHeightToComputedHeight(const Length& styleLogicalHeight);
 
     virtual LayoutRect overflowClipRect(const LayoutPoint& location, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) override;
 
     virtual void addOverflowFromChildren() override;
 
     void recalcSections() const;
-    void layoutCaption(RenderTableCaption*);
+    void layoutCaption(RenderTableCaption&);
 
     void distributeExtraLogicalHeight(int extraLogicalHeight);
 
     mutable Vector<int> m_columnPos;
     mutable Vector<ColumnStruct> m_columns;
     mutable Vector<RenderTableCaption*> m_captions;
     mutable Vector<RenderTableCol*> m_columnRenderers;
 
     mutable RenderTableSection* m_head;
     mutable RenderTableSection* m_foot;
@@ skipping 34 matching lines @@
     if (m_firstBody)
         return m_firstBody;
     return m_foot;
 }
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTable, isTable());
 
 } // namespace blink
 
 #endif // RenderTable_h