<label> element should send key and focus events if it has contenteditable attribute.

Source/core/html/HTMLLabelElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 48 matching lines @@
     ScriptWrappable::init(this);
 }
 
 PassRefPtr<HTMLLabelElement> HTMLLabelElement::create(const QualifiedName& tagName, Document* document)
 {
     return adoptRef(new HTMLLabelElement(tagName, document));
 }
 
 bool HTMLLabelElement::isFocusable() const
 {
-    return false;
+    HTMLLabelElement* that = const_cast<HTMLLabelElement*>(this);
+    return that->isContentEditable();
 }
 
 LabelableElement* HTMLLabelElement::control()
 {
     const AtomicString& controlId = getAttribute(forAttr);
     if (controlId.isNull()) {
         // Search the children and descendants of the label element for a form element.
         // per http://dev.w3.org/html5/spec/Overview.html#the-label-element
         // the form element must be "labelable form-associated element".
         Element* element = this;
@@ skipping 85 matching lines @@
 
 void HTMLLabelElement::accessKeyAction(bool sendMouseEvents)
 {
     if (HTMLElement* element = control())
         element->accessKeyAction(sendMouseEvents);
     else
         HTMLElement::accessKeyAction(sendMouseEvents);
 }
 
 } // namespace