Make VisiblePosition::FirstPositionInNode() to take const Node& instead of Node*

third_party/WebKit/Source/core/svg/SVGTextContentElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 197 matching lines @@
     return;
   }
 
   if (nchars > number_of_chars - charnum)
     nchars = number_of_chars - charnum;
 
   DCHECK(GetDocument().GetFrame());
 
   // Find selection start
   VisiblePosition start = VisiblePosition::FirstPositionInNode(
-      const_cast<SVGTextContentElement*>(this));
+      *const_cast<SVGTextContentElement*>(this));
   for (unsigned i = 0; i < charnum; ++i)
     start = NextPositionOf(start);
 
   // Find selection end
   VisiblePosition end(start);
   for (unsigned i = 0; i < nchars; ++i)
     end = NextPositionOf(end);
 
   // TODO(editing-dev): We assume |start| and |end| are not null and we don't
   // known when |start| and |end| are null. Once we get a such case, we check
@@ skipping 67 matching lines @@
       (!line_layout_item.IsSVGText() && !line_layout_item.IsSVGInline()))
     return nullptr;
 
   SVGElement* element = ToSVGElement(line_layout_item.GetNode());
   DCHECK(element);
   return IsSVGTextContentElement(*element) ? ToSVGTextContentElement(element)
                                            : 0;
 }
 
 }  // namespace blink