EventSender<T> singletons are better off on the Oilpan heap.

third_party/WebKit/Source/core/html/HTMLLinkElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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.
@@ skipping 27 matching lines @@
 #include "core/loader/LinkLoader.h"
 #include "core/loader/LinkLoaderClient.h"
 
 namespace blink {
 
 class HTMLLinkElement;
 class KURL;
 class LinkImport;
 
 template<typename T> class EventSender;
-typedef EventSender<HTMLLinkElement> LinkEventSender;
+using LinkEventSender = EventSender<HTMLLinkElement>;
 
 //
 // LinkStyle handles dynaically change-able link resources, which is
 // typically @rel="stylesheet".
 //
 // It could be @rel="shortcut icon" or soething else though. Each of
 // types might better be handled by a separate class, but dynamically
 // changing @rel makes it harder to move such a design so we are
 // sticking current way so far.
 //
@@ skipping 168 matching lines @@
     OwnPtrWillBeMember<RelList> m_relList;
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
     bool m_isInShadowTree;
 };
 
 } // namespace blink
 
 #endif // HTMLLinkElement_h