Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorDebuggerAgent.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 95 matching lines @@
     , m_javaScriptPauseScheduled(false)
     , m_debuggerStepScheduled(false)
     , m_listener(0)
     , m_skipStepInCount(numberOfStepsBeforeStepOut)
     , m_skipAllPauses(false)
 {
 }
 
 InspectorDebuggerAgent::~InspectorDebuggerAgent()
 {
+#if !ENABLE(OILPAN)
     ASSERT(!m_instrumentingAgents->inspectorDebuggerAgent());
+#endif
 }
 
 void InspectorDebuggerAgent::init()
 {
     // FIXME: make breakReason optional so that there was no need to init it with "other".
     clearBreakDetails();
     m_state->setLong(DebuggerAgentState::pauseOnExceptionsState, ScriptDebugServer::DontPauseOnExceptions);
 }
 
 void InspectorDebuggerAgent::enable()
@@ skipping 1103 matching lines @@
 {
     m_scripts.clear();
     m_breakpointIdToDebugServerBreakpointIds.clear();
     m_asyncCallStackTracker.clear();
     if (m_frontend)
         m_frontend->globalObjectCleared();
 }
 
 } // namespace WebCore