Drop LABEL element from form-associated elements.

third_party/WebKit/Source/web/WebLabelElement.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "public/web/WebLabelElement.h"
 
 #include "core/HTMLNames.h"
 #include "core/html/HTMLLabelElement.h"
+#include "core/html/LabelableElement.h"
 #include "public/platform/WebString.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 WebElement WebLabelElement::correspondingControl()
 {
     return WebElement(unwrap<HTMLLabelElement>()->control());
 }
 
 WebLabelElement::WebLabelElement(HTMLLabelElement* elem)
     : WebElement(elem)
 {
 }
 
 DEFINE_WEB_NODE_TYPE_CASTS(WebLabelElement, isHTMLLabelElement(constUnwrap<Node>()));
 
 WebLabelElement& WebLabelElement::operator=(HTMLLabelElement* elem)
 {
     m_private = elem;
     return *this;
 }
 
 WebLabelElement::operator HTMLLabelElement*() const
 {
     return toHTMLLabelElement(m_private.get());
 }
 
 } // namespace blink