Remove almost all clients of isHTMLElement

sky/engine/core/editing/ApplyBlockElementCommand.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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 212 matching lines @@
             if (text->previousSibling()->isTextNode()
                 && static_cast<unsigned>(m_endOfLastParagraph.offsetInContainerNode()) <= toText(text->previousSibling())->length())
                 m_endOfLastParagraph = Position(toText(text->previousSibling()), m_endOfLastParagraph.offsetInContainerNode());
         } else
             m_endOfLastParagraph = Position(text.get(), m_endOfLastParagraph.offsetInContainerNode() - 1);
     }
 
     return VisiblePosition(Position(text.get(), position.offsetInContainerNode() - 1));
 }
 
-PassRefPtr<HTMLElement> ApplyBlockElementCommand::createBlockElement() const
-{
-    RefPtr<HTMLElement> element = createHTMLElement(document(), m_tagName);
-    if (m_inlineStyle.length())
-        element->setAttribute(HTMLNames::styleAttr, m_inlineStyle);
-    return element.release();
 }
-
-}