InlinedVisitor: Migrate dom to use inlined tracing

Source/core/dom/ContextFeatures.h

 /*
  * Copyright (C) 2012 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 46 matching lines @@
     static PassRefPtrWillBeRawPtr<ContextFeatures> create(PassOwnPtr<ContextFeaturesClient>);
 
     static bool pagePopupEnabled(Document*);
     static bool mutationEventsEnabled(Document*);
     static bool pushStateEnabled(Document*);
 
     bool isEnabled(Document*, FeatureType, bool) const;
     void urlDidChange(Document*);
 
 #if ENABLE(OILPAN)
-    virtual void trace(Visitor* visitor) override { HeapSupplement<Page>::trace(visitor); }
+    DEFINE_INLINE_VIRTUAL_TRACE() { HeapSupplement<Page>::trace(visitor); }
 #endif
 
 private:
     explicit ContextFeatures(PassOwnPtr<ContextFeaturesClient> client)
         : m_client(client)
     { }
 
     OwnPtr<ContextFeaturesClient> m_client;
 };
 
@@ skipping 30 matching lines @@
     // See issue 294180
     //
     // if (m_client)
     //     return;
     // m_client->urlDidChange(document);
 }
 
 } // namespace blink
 
 #endif // ContextFeatures_h