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

third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * Copyright (C) 2008 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 63 matching lines @@
 };
 
 inline RepeatEvent* toRepeatEvent(Event* event)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!event || event->type() == "repeatn");
     return static_cast<RepeatEvent*>(event);
 }
 
 static SMILEventSender& smilEndEventSender()
 {
-    DEFINE_STATIC_LOCAL(SMILEventSender, sender, (EventTypeNames::endEvent));
-    return sender;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<SMILEventSender>, sender, (SMILEventSender::create(EventTypeNames::endEvent)));
+    return *sender;
 }
 
 static SMILEventSender& smilBeginEventSender()
 {
-    DEFINE_STATIC_LOCAL(SMILEventSender, sender, (EventTypeNames::beginEvent));
-    return sender;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<SMILEventSender>, sender, (SMILEventSender::create(EventTypeNames::beginEvent)));
+    return *sender;
 }
 
 static SMILEventSender& smilRepeatEventSender()
 {
-    DEFINE_STATIC_LOCAL(SMILEventSender, sender, (EventTypeNames::repeatEvent));
-    return sender;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<SMILEventSender>, sender, (SMILEventSender::create(EventTypeNames::repeatEvent)));
+    return *sender;
 }
 
 static SMILEventSender& smilRepeatNEventSender()
 {
-    DEFINE_STATIC_LOCAL(SMILEventSender, sender, (AtomicString("repeatn", AtomicString::ConstructFromLiteral)));
-    return sender;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<SMILEventSender>, sender, (SMILEventSender::create(AtomicString("repeatn", AtomicString::ConstructFromLiteral))));
+    return *sender;
 }
 
 // This is used for duration type time values that can't be negative.
 static const double invalidCachedTime = -1.;
 
 class ConditionEventListener final : public EventListener {
 public:
     static PassRefPtrWillBeRawPtr<ConditionEventListener> create(SVGSMILElement* animation, SVGSMILElement::Condition* condition)
     {
         return adoptRefWillBeNoop(new ConditionEventListener(animation, condition));
@@ skipping 85 matching lines @@
     , m_cachedMin(invalidCachedTime)
     , m_cachedMax(invalidCachedTime)
 {
     resolveFirstInterval();
 }
 
 SVGSMILElement::~SVGSMILElement()
 {
 #if !ENABLE(OILPAN)
     clearResourceAndEventBaseReferences();
-#endif
     smilEndEventSender().cancelEvent(this);
     smilBeginEventSender().cancelEvent(this);
     smilRepeatEventSender().cancelEvent(this);
     smilRepeatNEventSender().cancelEvent(this);
-#if !ENABLE(OILPAN)
     clearConditions();
 
     unscheduleIfScheduled();
 #endif
 }
 
 void SVGSMILElement::clearResourceAndEventBaseReferences()
 {
     removeAllOutgoingReferences();
 }
@@ skipping 1138 matching lines @@
     visitor->trace(m_targetElement);
     visitor->trace(m_timeContainer);
     visitor->trace(m_conditions);
     visitor->trace(m_syncBaseDependents);
 #endif
     SVGElement::trace(visitor);
     SVGTests::trace(visitor);
 }
 
 } // namespace blink