Oilpan: Move the EventListener hierarchy to Oilpan's heap

Source/bindings/core/v8/V8AbstractEventListener.h

Index: Source/bindings/core/v8/V8AbstractEventListener.h
diff --git a/Source/bindings/core/v8/V8AbstractEventListener.h b/Source/bindings/core/v8/V8AbstractEventListener.h
index dc609751121607b7795e3ecfad8b1b0fd4bcf2e5..cd3a4126cfa3a05484029a6beb01eba158a4c0c9 100644
--- a/Source/bindings/core/v8/V8AbstractEventListener.h
+++ b/Source/bindings/core/v8/V8AbstractEventListener.h
@@ -81,7 +81,7 @@ public:
         // as it may attempt to compile a function (lazy event listener), get an error
         // and invoke onerror callback which can execute arbitrary JS code.
         // Protect this event listener to keep it alive.
-        RefPtr<V8AbstractEventListener> guard(this);
+        RefPtrWillBeRawPtr<V8AbstractEventListener> protect(this);
         prepareListenerObject(executionContext);
         return m_listener.newLocal(m_isolate);
     }
@@ -112,6 +112,11 @@ public:
     v8::Isolate* isolate() const { return m_isolate; }
     DOMWrapperWorld& world() const { return *m_world; }
 
+    DEFINE_INLINE_VIRTUAL_TRACE()
+    {
+        EventListener::trace(visitor);
+    }
+
 protected:
     V8AbstractEventListener(bool isAttribute, DOMWrapperWorld&, v8::Isolate*);