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

third_party/WebKit/Source/core/html/HTMLSourceElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLPictureElement.h"
 #include "platform/Logging.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 static SourceEventSender& sourceErrorEventSender()
 {
-    DEFINE_STATIC_LOCAL(SourceEventSender, sharedErrorEventSender, (EventTypeNames::error));
-    return sharedErrorEventSender;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<SourceEventSender>, sharedErrorEventSender, (SourceEventSender::create(EventTypeNames::error)));
+    return *sharedErrorEventSender;
 }
 
 class HTMLSourceElement::Listener final : public MediaQueryListListener {
 public:
     explicit Listener(HTMLSourceElement* element) : m_element(element) { }
     void notifyMediaQueryChanged() override
     {
         if (m_element)
             m_element->notifyMediaQueryChanged();
     }
@@ skipping 12 matching lines @@
     : HTMLElement(sourceTag, document)
     , m_listener(adoptRefWillBeNoop(new Listener(this)))
 {
     WTF_LOG(Media, "HTMLSourceElement::HTMLSourceElement - %p", this);
 }
 
 DEFINE_NODE_FACTORY(HTMLSourceElement)
 
 HTMLSourceElement::~HTMLSourceElement()
 {
+#if !ENABLE(OILPAN)
     sourceErrorEventSender().cancelEvent(this);
-#if !ENABLE(OILPAN)
     m_listener->clearElement();
 #endif
 }
 
 void HTMLSourceElement::createMediaQueryList(const AtomicString& media)
 {
     if (media.isEmpty())
         return;
 
     if (m_mediaQueryList)
@@ skipping 99 matching lines @@
 }
 
 DEFINE_TRACE(HTMLSourceElement)
 {
     visitor->trace(m_mediaQueryList);
     visitor->trace(m_listener);
     HTMLElement::trace(visitor);
 }
 
 }