First part of work to move V8 binding integrity off of vtables.

Source/WebCore/dom/PageTransitionEvent.cpp

Index: Source/WebCore/dom/PageTransitionEvent.cpp
diff --git a/Source/WebCore/dom/PageTransitionEvent.cpp b/Source/WebCore/dom/PageTransitionEvent.cpp
index fa42d0cf1a7932635f236a609de69abfec612997..d5d5ee8babfd1243110fabffafa2b9989f9d547b 100644
--- a/Source/WebCore/dom/PageTransitionEvent.cpp
+++ b/Source/WebCore/dom/PageTransitionEvent.cpp
@@ -38,18 +38,21 @@ PageTransitionEventInit::PageTransitionEventInit()
 PageTransitionEvent::PageTransitionEvent()
     : m_persisted(false)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::PageTransitionEvent(const AtomicString& type, bool persisted)
     : Event(type, true, true)
     , m_persisted(persisted)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::PageTransitionEvent(const AtomicString& type, const PageTransitionEventInit& initializer)
     : Event(type, initializer)
     , m_persisted(initializer.persisted)
 {
+    ScriptWrappable::init(this);
 }
 
 PageTransitionEvent::~PageTransitionEvent()