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

Source/WebCore/dom/Element.cpp

Index: Source/WebCore/dom/Element.cpp
===================================================================
--- Source/WebCore/dom/Element.cpp	(revision 146891)
+++ Source/WebCore/dom/Element.cpp	(working copy)
@@ -1176,25 +1176,6 @@
 {
 }
 
-bool Element::disabled() const
-{
-#if ENABLE(DIALOG_ELEMENT)
-    // FIXME: disabled and inert are separate concepts in the spec, but now we treat them as the same.
-    // For example, an inert, non-disabled form control should not be grayed out.
-    if (isInert())
-        return true;
-#endif
-    return false;
-}
-
-#if ENABLE(DIALOG_ELEMENT)
-bool Element::isInert() const
-{
-    Element* dialog = document()->activeModalDialog();
-    return dialog && !containsIncludingShadowDOM(dialog) && !dialog->containsIncludingShadowDOM(this);
-}
-#endif
-
 Node::InsertionNotificationRequest Element::insertedInto(ContainerNode* insertionPoint)
 {
     // need to do superclass processing first so inDocument() is true