Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/PageRuntimeAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 37 matching lines @@
 PageRuntimeAgent::PageRuntimeAgent(InjectedScriptManager* injectedScriptManager, ScriptDebugServer* scriptDebugServer, Page* page, InspectorPageAgent* pageAgent)
     : InspectorRuntimeAgent(injectedScriptManager, scriptDebugServer)
     , m_inspectedPage(page)
     , m_pageAgent(pageAgent)
     , m_mainWorldContextCreated(false)
 {
 }
 
 PageRuntimeAgent::~PageRuntimeAgent()
 {
+#if !ENABLE(OILPAN)
     m_instrumentingAgents->setPageRuntimeAgent(0);
+#endif
+}
+
+void PageRuntimeAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_pageAgent);
+    InspectorRuntimeAgent::trace(visitor);
 }
 
 void PageRuntimeAgent::init()
 {
     m_instrumentingAgents->setPageRuntimeAgent(this);
 }
 
 void PageRuntimeAgent::enable(ErrorString* errorString)
 {
     if (m_enabled)
@@ skipping 85 matching lines @@
         if (scriptState->contextIsEmpty() || window == scriptState->domWindow()) {
             scriptStatesToRemove.append(scriptState);
             m_frontend->executionContextDestroyed(it->value);
         }
     }
     m_scriptStateToId.removeAll(scriptStatesToRemove);
 }
 
 } // namespace WebCore