[wrapper-tracing] Bring remoteplayback up to date

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 251 matching lines @@
     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