Remove custom left overs from object grouping

third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp

Index: third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp
diff --git a/third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp b/third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp
index 33ec9d0d358c2e9aaa73dd5f05324ccc13f94d82..e97a6f146742d6603efae4b4c162969985ed4024 100644
--- a/third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp
+++ b/third_party/WebKit/Source/core/events/PromiseRejectionEvent.cpp
@@ -51,19 +51,6 @@ ScriptValue PromiseRejectionEvent::reason(ScriptState* scriptState) const {
   return ScriptValue(scriptState, m_reason.newLocal(scriptState->isolate()));
 }
 
-void PromiseRejectionEvent::setWrapperReference(
-    v8::Isolate* isolate,
-    const v8::Persistent<v8::Object>& wrapper) {
-  // This might create cross world references. However, the regular code path
-  // will not create them, and if we get a cross world reference here, the
-  // worst thing is that the lifetime is too long (similar to what happens
-  // for DOM trees).
-  if (!m_promise.isEmpty())
-    m_promise.setReference(wrapper, isolate);
-  if (!m_reason.isEmpty())
-    m_reason.setReference(wrapper, isolate);
-}
-
 const AtomicString& PromiseRejectionEvent::interfaceName() const {
   return EventNames::PromiseRejectionEvent;
 }