InlinedVisitor: Migrate dom to use inlined tracing

Source/core/dom/custom/CustomElementMicrotaskRunQueue.cpp

 // Copyright 2014 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 "config.h"
 #include "core/dom/custom/CustomElementMicrotaskRunQueue.h"
 
 #include "core/dom/Microtask.h"
 #include "core/dom/custom/CustomElementAsyncImportMicrotaskQueue.h"
 #include "core/dom/custom/CustomElementSyncMicrotaskQueue.h"
@@ skipping 34 matching lines @@
 }
 
 void CustomElementMicrotaskRunQueue::requestDispatchIfNeeded()
 {
     if (m_dispatchIsPending || isEmpty())
         return;
     Microtask::enqueueMicrotask(WTF::bind(&CustomElementMicrotaskRunQueue::dispatchIfAlive, m_weakFactory.createWeakPtr()));
     m_dispatchIsPending = true;
 }
 
-void CustomElementMicrotaskRunQueue::trace(Visitor* visitor)
+DEFINE_TRACE(CustomElementMicrotaskRunQueue)
 {
     visitor->trace(m_syncQueue);
     visitor->trace(m_asyncQueue);
 }
 
 void CustomElementMicrotaskRunQueue::dispatch()
 {
     m_dispatchIsPending = false;
     m_syncQueue->dispatch();
     if (m_syncQueue->isEmpty())
         m_asyncQueue->dispatch();
 }
 
 bool CustomElementMicrotaskRunQueue::isEmpty() const
 {
     return m_syncQueue->isEmpty() && m_asyncQueue->isEmpty();
 }
 
 } // namespace blink