Remove almost all clients of isHTMLElement

sky/engine/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 471 matching lines @@
             m_endOfInsertedContent = m_startOfInsertedContent;
     }
 }
 
 static bool isInlineHTMLElementWithStyle(const Node* node)
 {
     // We don't want to skip over any block elements.
     if (isBlock(node))
         return false;
 
-    if (!node->isHTMLElement())
+    if (!node->isElementNode())
         return false;
 
     // We can skip over elements whose class attribute is
     // one of our internal classes.
-    const HTMLElement* element = toHTMLElement(node);
+    const Element* element = toElement(node);
     const AtomicString& classAttributeValue = element->getAttribute(HTMLNames::classAttr);
     if (classAttributeValue == AppleTabSpanClass)
         return true;
     if (classAttributeValue == AppleConvertedSpace)
         return true;
     if (classAttributeValue == ApplePasteAsQuotation)
         return true;
 
     return EditingStyle::elementIsStyledSpanOrHTMLEquivalent(element);
 }
@@ skipping 490 matching lines @@
         return false;
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 } // namespace blink