Remove unused Document::getFocusableNodes

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 614 matching lines @@
     */
     String preferredStylesheetSet() const;
     String selectedStylesheetSet() const;
     void setSelectedStylesheetSet(const String&);
 
     bool setFocusedElement(PassRefPtr<Element>, FocusDirection = FocusDirectionNone);
     Node* focusedNode() const { return m_focusedNode.get(); }
     UserActionElementSet& userActionElements()  { return m_userActionElements; }
     const UserActionElementSet& userActionElements() const { return m_userActionElements; }
     void didRunCheckFocusedNodeTask() { m_didPostCheckFocusedNodeTask = false; }
-    void getFocusableNodes(Vector<RefPtr<Node> >&);
-    
+
     // The m_ignoreAutofocus flag specifies whether or not the document has been changed by the user enough 
     // for WebCore to ignore the autofocus attribute on any form controls
     bool ignoreAutofocus() const { return m_ignoreAutofocus; };
     void setIgnoreAutofocus(bool shouldIgnore = true) { m_ignoreAutofocus = shouldIgnore; };
 
     void setHoverNode(PassRefPtr<Node>);
     Node* hoverNode() const { return m_hoverNode.get(); }
 
     void setActiveElement(PassRefPtr<Element>);
     Element* activeElement() const { return m_activeElement.get(); }
@@ skipping 763 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == documentInternal();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h