Add DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION() macro

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 936 matching lines @@
 }
 
 void Editor::redo()
 {
     if (UndoStack* undoStack = this->undoStack())
         undoStack->redo();
 }
 
 void Editor::setBaseWritingDirection(WritingDirection direction)
 {
-    Node* focusedElement = frame().document()->focusedElement();
-    if (focusedElement && isHTMLTextFormControlElement(*focusedElement)) {
+    Element* focusedElement = frame().document()->focusedElement();
+    if (isHTMLTextFormControlElement(focusedElement)) {
         if (direction == NaturalWritingDirection)
             return;
-        toHTMLElement(focusedElement)->setAttribute(dirAttr, direction == LeftToRightWritingDirection ? "ltr" : "rtl");
+        focusedElement->setAttribute(dirAttr, direction == LeftToRightWritingDirection ? "ltr" : "rtl");
         focusedElement->dispatchInputEvent();
         frame().document()->updateStyleIfNeeded();
         return;
     }
 
     RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(CSSPropertyDirection, direction == LeftToRightWritingDirection ? "ltr" : direction == RightToLeftWritingDirection ? "rtl" : "inherit", false);
     applyParagraphStyleToSelection(style.get(), EditActionSetWritingDirection);
 }
 
@@ skipping 258 matching lines @@
     return m_frame.spellChecker();
 }
 
 void Editor::toggleOverwriteModeEnabled()
 {
     m_overwriteModeEnabled = !m_overwriteModeEnabled;
     frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
 }
 
 } // namespace WebCore