InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/forms/RadioButtonGroupScope.h

 /*
  * Copyright (C) 2007, 2008, 2009 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 19 matching lines @@
 namespace blink {
 
 class HTMLInputElement;
 class RadioButtonGroup;
 
 class RadioButtonGroupScope {
     DISALLOW_ALLOCATION();
 public:
     RadioButtonGroupScope();
     ~RadioButtonGroupScope();
-    void trace(Visitor*);
+    DECLARE_TRACE();
     void addButton(HTMLInputElement*);
     void updateCheckedState(HTMLInputElement*);
     void requiredAttributeChanged(HTMLInputElement*);
     void removeButton(HTMLInputElement*);
     HTMLInputElement* checkedButtonForGroup(const AtomicString& groupName) const;
     bool isInRequiredGroup(HTMLInputElement*) const;
 
 private:
     typedef WillBeHeapHashMap<AtomicString, OwnPtrWillBeMember<RadioButtonGroup>, CaseFoldingHash> NameToGroupMap;
     OwnPtrWillBeMember<NameToGroupMap> m_nameToGroupMap;
 };
 
 } // namespace blink
 
 #endif // RadioButtonGroupScope_h