Move Frame to the Oilpan heap.

Source/core/plugins/DOMPlugin.cpp

 /*
  *  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 17 matching lines @@
     : FrameDestructionObserver(frame)
     , m_pluginData(pluginData)
     , m_index(index)
 {
 }
 
 DOMPlugin::~DOMPlugin()
 {
 }
 
+void DOMPlugin::trace(Visitor* visitor)
+{
+    FrameDestructionObserver::trace(visitor);
+}
+
 String DOMPlugin::name() const
 {
     return pluginInfo().name;
 }
 
 String DOMPlugin::filename() const
 {
     return pluginInfo().file;
 }
 
@@ skipping 34 matching lines @@
 PassRefPtrWillBeRawPtr<DOMMimeType> DOMPlugin::namedItem(const AtomicString& propertyName)
 {
     const Vector<MimeClassInfo>& mimes = m_pluginData->mimes();
     for (unsigned i = 0; i < mimes.size(); ++i)
         if (mimes[i].type == propertyName)
             return DOMMimeType::create(m_pluginData.get(), m_frame, i).get();
     return nullptr;
 }
 
 } // namespace blink