[wrapper-tracing] Fix EventTarget with LazyEventListeners

third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
index 6c633518c8377530f9e5486a1f2e36f963112d58..3c2aa553a323bd9212ba5720858a927579f46d81 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptWrappableVisitor.h
@@ -103,6 +103,12 @@ class CORE_EXPORT ScriptWrappableVisitor : public WrapperVisitor,
 
   static WrapperVisitor* currentVisitor(v8::Isolate*);
 
+  static void writeBarrier(const void* srcObject,
+                           const ScopedPersistent<v8::Object>* dstObject) {
+    markWrapper(
+        &(const_cast<ScopedPersistent<v8::Object>*>(scopedPersistent)->get()));
+  }
+
   template <typename T>
   static void writeBarrier(const void* object, const Member<T> value) {
     writeBarrier(object, value.get());