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

Source/WebCore/dom/PopStateEvent.cpp

Index: Source/WebCore/dom/PopStateEvent.cpp
diff --git a/Source/WebCore/dom/PopStateEvent.cpp b/Source/WebCore/dom/PopStateEvent.cpp
index d1e0c758a49766c6f6ff156e83d6a66657d6b149..bec2e92329a41c2e274b4d7cd1ca9cda86ec8b16 100644
--- a/Source/WebCore/dom/PopStateEvent.cpp
+++ b/Source/WebCore/dom/PopStateEvent.cpp
@@ -42,6 +42,7 @@ PopStateEvent::PopStateEvent()
     , m_serializedState(0)
     , m_history(0)
 {
+    ScriptWrappable::init(this);
 }
 
 PopStateEvent::PopStateEvent(const AtomicString& type, const PopStateEventInit& initializer)
@@ -50,6 +51,7 @@ PopStateEvent::PopStateEvent(const AtomicString& type, const PopStateEventInit&
     , m_serializedState(0)
     , m_history(0)
 {
+    ScriptWrappable::init(this);
 }
 
 PopStateEvent::PopStateEvent(PassRefPtr<SerializedScriptValue> serializedState, PassRefPtr<History> history)
@@ -57,6 +59,7 @@ PopStateEvent::PopStateEvent(PassRefPtr<SerializedScriptValue> serializedState,
     , m_serializedState(serializedState)
     , m_history(history)
 {
+    ScriptWrappable::init(this);
 }
 
 PopStateEvent::~PopStateEvent()