Remove custom left overs from object grouping

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PromiseRejectionEvent_h
 #define PromiseRejectionEvent_h
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 13 matching lines @@
   static PromiseRejectionEvent* create(
       ScriptState* state,
       const AtomicString& type,
       const PromiseRejectionEventInit& initializer) {
     return new PromiseRejectionEvent(state, type, initializer);
   }
 
   ScriptValue reason(ScriptState*) const;
   ScriptPromise promise(ScriptState*) const;
 
-  void setWrapperReference(v8::Isolate*, const v8::Persistent<v8::Object>&);
-
   const AtomicString& interfaceName() const override;
 
   // PromiseRejectionEvents are similar to ErrorEvents in that they can't be
   // observed across different worlds.
   bool canBeDispatchedInWorld(const DOMWrapperWorld&) const override;
 
   DECLARE_VIRTUAL_TRACE();
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
  private:
   PromiseRejectionEvent(ScriptState*,
                         const AtomicString&,
                         const PromiseRejectionEventInit&);
   ~PromiseRejectionEvent() override;
   void dispose();
 
   RefPtr<DOMWrapperWorld> m_world;
   TraceWrapperV8Reference<v8::Value> m_promise;
   TraceWrapperV8Reference<v8::Value> m_reason;
 };
 
 }  // namespace blink
 
 #endif  // PromiseRejectionEvent_h