Tried using CrossThreadPersistent for workerDebuggerAgents

Source/modules/filesystem/InspectorFileSystemAgent.cpp

 /*
  * Copyright (C) 2011, 2012 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 577 matching lines @@
 
 bool DeleteEntryRequest::didDeleteEntry()
 {
     reportResult(static_cast<FileError::ErrorCode>(0));
     return true;
 }
 
 } // anonymous namespace
 
 // static
-PassOwnPtr<InspectorFileSystemAgent> InspectorFileSystemAgent::create(Page* page)
+PassOwnPtrWillBeRawPtr<InspectorFileSystemAgent> InspectorFileSystemAgent::create(Page* page)
 {
-    return adoptPtr(new InspectorFileSystemAgent(page));
+    return adoptPtrWillBeNoop(new InspectorFileSystemAgent(page));
 }
 
 InspectorFileSystemAgent::~InspectorFileSystemAgent()
 {
 }
 
 void InspectorFileSystemAgent::enable(ErrorString*)
 {
     if (m_enabled)
         return;
@@ skipping 105 matching lines @@
 {
     for (LocalFrame* frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->document() && frame->document()->securityOrigin()->isSameSchemeHostPort(origin))
             return frame->document();
     }
 
     *error = "No frame is available for the request";
     return 0;
 }
 
+void InspectorFileSystemAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace WebCore