[wrapper-tracing] Redesign dispatching on non-inheriting cases

third_party/WebKit/Source/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 195 matching lines @@
   RefPtr<ComputedStyle> m_computedStyle;
   // TODO(davaajav):remove this field when v0 custom elements are deprecated
   Member<V0CustomElementDefinition> m_v0CustomElementDefinition;
   Member<CustomElementDefinition> m_customElementDefinition;
 
   Member<PseudoElementData> m_pseudoElementData;
 
   explicit ElementRareData(LayoutObject*);
 };
 
+DEFINE_TRAIT_FOR_TRACE_WRAPPERS(ElementRareData);
+
 inline LayoutSize defaultMinimumSizeForResizing() {
   return LayoutSize(LayoutUnit::max(), LayoutUnit::max());
 }
 
 inline ElementRareData::ElementRareData(LayoutObject* layoutObject)
     : NodeRareData(layoutObject),
       m_minimumSizeForResizing(defaultMinimumSizeForResizing()),
       m_classList(nullptr) {
   m_isElementRareData = true;
 }
@@ skipping 41 matching lines @@
 inline CompositorProxiedPropertySet&
 ElementRareData::ensureCompositorProxiedPropertySet() {
   if (!m_proxiedProperties)
     m_proxiedProperties = CompositorProxiedPropertySet::create();
   return *m_proxiedProperties;
 }
 
 }  // namespace blink
 
 #endif  // ElementRareData_h