Add UseCounters for the Attr.value getter and setter

Source/core/dom/Attr.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2012 Apple Inc. All rights reserved.
  *
  * 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 10 matching lines @@
  * Boston, MA 02110-1301, USA.
  */
 #include "config.h"
 #include "core/dom/Attr.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Element.h"
 #include "core/dom/Text.h"
 #include "core/events/ScopedEventQueue.h"
+#include "core/frame/UseCounter.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 Attr::Attr(Element& element, const QualifiedName& name)
     : ContainerNode(&element.document())
     , m_element(&element)
@@ skipping 54 matching lines @@
     if (m_element)
         elementAttribute().setValue(value);
     else
         m_standaloneValue = value;
     createTextChild();
     m_ignoreChildrenChanged--;
 
     invalidateNodeListCachesInAncestors(&m_name, m_element);
 }
 
-void Attr::setValue(const AtomicString& value, ExceptionState&)
+void Attr::setValueInternal(const AtomicString& value)
 {
     if (m_element)
         m_element->willModifyAttribute(qualifiedName(), this->value(), value);
 
     setValue(value);
 
     if (m_element)
         m_element->didModifyAttribute(qualifiedName(), value);
 }
 
+const AtomicString& Attr::valueForBindings() const
+{
+    UseCounter::count(document(), UseCounter::AttrGetValue);
+    return value();
+}
+
+void Attr::setValueForBindings(const AtomicString& value)
+{
+    UseCounter::count(document(), UseCounter::AttrSetValue);
+    setValueInternal(value);
+}
+
 void Attr::setNodeValue(const String& v)
 {
     // Attr uses AtomicString type for its value to save memory as there
     // is duplication among Elements' attributes values.
-    setValue(AtomicString(v), IGNORE_EXCEPTION);
+    setValueInternal(AtomicString(v));
 }
 
 PassRefPtr<Node> Attr::cloneNode(bool /*deep*/)
 {
     RefPtr<Attr> clone = adoptRef(new Attr(document(), qualifiedName(), value()));
     cloneChildNodes(clone.get());
     return clone.release();
 }
 
 // DOM Section 1.1.1
@@ skipping 51 matching lines @@
 }
 
 void Attr::attachToElement(Element* element)
 {
     ASSERT(!m_element);
     m_element = element;
     m_standaloneValue = nullAtom;
 }
 
 }