Revert 146744 "Refactoring: Pull Node::disabled() and Node::isIn..."

Source/WebCore/dom/Node.h

Index: Source/WebCore/dom/Node.h
===================================================================
--- Source/WebCore/dom/Node.h	(revision 146891)
+++ Source/WebCore/dom/Node.h	(working copy)
@@ -416,6 +416,10 @@
     virtual bool isMouseFocusable() const;
     virtual Node* focusDelegate();
 
+#if ENABLE(DIALOG_ELEMENT)
+    bool isInert() const;
+#endif
+
     enum UserSelectAllTreatment {
         UserSelectAllDoesNotAffectEditability,
         UserSelectAllIsAlwaysNonEditable
@@ -661,6 +665,10 @@
     // Perform the default action for an event.
     virtual void defaultEventHandler(Event*);
 
+    // Used for disabled form elements; if true, prevents mouse events from being dispatched
+    // to event listeners, and prevents DOMActivate events from being sent at all.
+    virtual bool disabled() const;
+
     using TreeShared<Node>::ref;
     using TreeShared<Node>::deref;