Oilpan: Remove a visitor parameter from isHeapObjectAlive

Source/core/frame/LocalFrame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 761 matching lines @@
 void LocalFrame::unregisterPluginElement(HTMLPlugInElement* plugin)
 {
     ASSERT(m_pluginElements.contains(plugin));
     m_pluginElements.remove(plugin);
 }
 
 void LocalFrame::clearWeakMembers(Visitor* visitor)
 {
     Vector<HTMLPlugInElement*> deadPlugins;
     for (const auto& pluginElement : m_pluginElements) {
-        if (!visitor->isHeapObjectAlive(pluginElement)) {
+        if (!Heap::isHeapObjectAlive(pluginElement)) {
             pluginElement->shouldDisposePlugin();
             deadPlugins.append(pluginElement);
         }
     }
     for (unsigned i = 0; i < deadPlugins.size(); ++i)
         m_pluginElements.remove(deadPlugins[i]);
 }
 #endif
 
 String LocalFrame::localLayerTreeAsText(unsigned flags) const
@@ skipping 19 matching lines @@
     , m_textZoomFactor(parentTextZoomFactor(this))
     , m_inViewSourceMode(false)
 {
     if (isLocalRoot())
         m_instrumentingAgents = InstrumentingAgents::create();
     else
         m_instrumentingAgents = localFrameRoot()->m_instrumentingAgents;
 }
 
 } // namespace blink