Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorDOMStorageAgent.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 60 matching lines @@
     : InspectorBaseAgent<InspectorDOMStorageAgent>("DOMStorage")
     , m_pageAgent(pageAgent)
     , m_frontend(0)
 {
 }
 
 InspectorDOMStorageAgent::~InspectorDOMStorageAgent()
 {
 }
 
+void InspectorDOMStorageAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_pageAgent);
+    InspectorBaseAgent::trace(visitor);
+}
+
 void InspectorDOMStorageAgent::setFrontend(InspectorFrontend* frontend)
 {
     m_frontend = frontend;
 }
 
 void InspectorDOMStorageAgent::clearFrontend()
 {
     m_frontend = 0;
     disable(0);
 }
@@ skipping 126 matching lines @@
     }
     targetFrame = frame;
 
     if (isLocalStorage)
         return StorageNamespace::localStorageArea(frame->document()->securityOrigin());
     return m_pageAgent->page()->sessionStorage()->storageArea(frame->document()->securityOrigin());
 }
 
 } // namespace WebCore