Improve DEFINE_STATIC_LOCAL()'s handling of Blink GCed objects.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
  *           (C) 2007 Rob Buis (buis@kde.org)
  *
  * 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
@@ skipping 19 matching lines @@
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
 #include "core/events/EventSender.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 static StyleEventSender& styleLoadEventSender()
 {
-    DEFINE_STATIC_LOCAL(Persistent<StyleEventSender>, sharedLoadEventSender, (StyleEventSender::create(EventTypeNames::load)));
-    return *sharedLoadEventSender;
+    DEFINE_STATIC_LOCAL(StyleEventSender, sharedLoadEventSender, (StyleEventSender::create(EventTypeNames::load)));
+    return sharedLoadEventSender;
 }
 
 inline HTMLStyleElement::HTMLStyleElement(Document& document, bool createdByParser)
     : HTMLElement(styleTag, document)
     , StyleElement(&document, createdByParser)
     , m_firedLoad(false)
     , m_loadedSheet(false)
 {
 }
 
@@ skipping 102 matching lines @@
         styleSheet->setDisabled(setDisabled);
 }
 
 DEFINE_TRACE(HTMLStyleElement)
 {
     StyleElement::trace(visitor);
     HTMLElement::trace(visitor);
 }
 
 } // namespace blink