Remove custom left overs from object grouping

third_party/WebKit/Source/modules/remoteplayback/RemotePlayback.cpp

 // Copyright 2016 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.
 
 #include "modules/remoteplayback/RemotePlayback.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/modules/v8/RemotePlaybackAvailabilityCallback.h"
 #include "core/HTMLNames.h"
 #include "core/dom/DOMException.h"
@@ skipping 275 matching lines @@
         InvalidStateError, "disableRemotePlayback attribute is present."));
     m_promptPromiseResolver = nullptr;
   }
 
   m_availabilityCallbacks.clear();
 
   if (m_state != WebRemotePlaybackState::Disconnected)
     m_mediaElement->requestRemotePlaybackStop();
 }
 
-void RemotePlayback::setV8ReferencesForCallbacks(
-    v8::Isolate* isolate,
-    const v8::Persistent<v8::Object>& wrapper) {
-  for (auto callback : m_availabilityCallbacks.values())
-    callback->setWrapperReference(isolate, wrapper);
-}
-
 DEFINE_TRACE(RemotePlayback) {
   visitor->trace(m_availabilityCallbacks);
   visitor->trace(m_promptPromiseResolver);
   visitor->trace(m_mediaElement);
   EventTargetWithInlineData::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(RemotePlayback) {
   for (auto callback : m_availabilityCallbacks.values()) {
     visitor->traceWrappers(callback);
   }
   EventTargetWithInlineData::traceWrappers(visitor);
 }
 
 }  // namespace blink