Move Frame to the Oilpan heap.

Source/core/plugins/DOMMimeType.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 20 matching lines @@
     : FrameDestructionObserver(frame)
     , m_pluginData(pluginData)
     , m_index(index)
 {
 }
 
 DOMMimeType::~DOMMimeType()
 {
 }
 
+void DOMMimeType::trace(Visitor* visitor)
+{
+    FrameDestructionObserver::trace(visitor);
+}
+
 const String &DOMMimeType::type() const
 {
     return mimeClassInfo().type;
 }
 
 String DOMMimeType::suffixes() const
 {
     const Vector<String>& extensions = mimeClassInfo().extensions;
 
     StringBuilder builder;
@@ skipping 15 matching lines @@
     // FIXME: allowPlugins is just a client call. We should not need
     // to bounce through the loader to get there.
     // Something like: m_frame->host()->client()->allowPlugins().
     if (!m_frame || !m_frame->loader().allowPlugins(NotAboutToInstantiatePlugin))
         return nullptr;
 
     return DOMPlugin::create(m_pluginData.get(), m_frame, m_pluginData->mimePluginIndices()[m_index]);
 }
 
 } // namespace blink