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

Source/WebCore/html/canvas/WebGLContextEvent.cpp

Index: Source/WebCore/html/canvas/WebGLContextEvent.cpp
diff --git a/Source/WebCore/html/canvas/WebGLContextEvent.cpp b/Source/WebCore/html/canvas/WebGLContextEvent.cpp
index 3351a4b085096decf0b86b614ee75c0137aeb7d4..94878e4f24c1e16a7c71cb512917feeb77068507 100644
--- a/Source/WebCore/html/canvas/WebGLContextEvent.cpp
+++ b/Source/WebCore/html/canvas/WebGLContextEvent.cpp
@@ -36,18 +36,21 @@ WebGLContextEventInit::WebGLContextEventInit()
 
 WebGLContextEvent::WebGLContextEvent()
 {
+    ScriptWrappable::init(this);
 }
 
 WebGLContextEvent::WebGLContextEvent(const AtomicString& type, bool canBubble, bool cancelable, const String& statusMessage)
     : Event(type, canBubble, cancelable)
     , m_statusMessage(statusMessage)
 {
+    ScriptWrappable::init(this);
 }
 
 WebGLContextEvent::WebGLContextEvent(const AtomicString& type, const WebGLContextEventInit& initializer)
     : Event(type, initializer)
     , m_statusMessage(initializer.statusMessage)
 {
+    ScriptWrappable::init(this);
 }
 
 WebGLContextEvent::~WebGLContextEvent()