Use toElement instead of static_cast<Element*> and static_cast<const Element*>

Source/core/editing/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google Inc. 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 80 matching lines @@
 
     RefPtr<Document> m_document;
     RefPtr<DocumentFragment> m_fragment;
     bool m_hasInterchangeNewlineAtStart;
     bool m_hasInterchangeNewlineAtEnd;
 };
 
 static bool isInterchangeNewlineNode(const Node *node)
 {
     DEFINE_STATIC_LOCAL(String, interchangeNewlineClassString, (AppleInterchangeNewline));
-    return node && node->hasTagName(brTag) && 
-           static_cast<const Element *>(node)->getAttribute(classAttr) == interchangeNewlineClassString;
+    return node && node->hasTagName(brTag) && toElement(node)->getAttribute(classAttr) == interchangeNewlineClassString;
 }
 
 static bool isInterchangeConvertedSpaceSpan(const Node *node)
 {
     DEFINE_STATIC_LOCAL(String, convertedSpaceSpanClassString, (AppleConvertedSpace));
     return node->isHTMLElement() && 
            static_cast<const HTMLElement *>(node)->getAttribute(classAttr) == convertedSpaceSpanClassString;
 }
 
 static Position positionAvoidingPrecedingNodes(Position pos)
@@ skipping 1371 matching lines @@
         removeNodeAndPruneAncestors(nodeAfterInsertionPos.get());
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 } // namespace WebCore