Remove tons of OILPAN.

sky/engine/core/dom/custom/CustomElementMicrotaskQueueBase.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/CustomElementMicrotaskQueueBase.h"
 
 #include "core/dom/custom/CustomElementProcessingStack.h"
 
 namespace blink {
 
 void CustomElementMicrotaskQueueBase::dispatch()
 {
     ASSERT(!m_inDispatch);
     m_inDispatch = true;
     doDispatch();
     m_inDispatch = false;
 }
 
-void CustomElementMicrotaskQueueBase::trace(Visitor* visitor)
-{
-    visitor->trace(m_queue);
-}
-
 } // namespace blink