Add DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION() macro

Source/core/editing/Editor.cpp

Index: Source/core/editing/Editor.cpp
diff --git a/Source/core/editing/Editor.cpp b/Source/core/editing/Editor.cpp
index 72277832ce0f946523b772e2330574818256859f..940eb4cadeb80df0d1e3c33f88c41a60886bf485 100644
--- a/Source/core/editing/Editor.cpp
+++ b/Source/core/editing/Editor.cpp
@@ -954,11 +954,11 @@ void Editor::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;