Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorConsoleAgent.cpp

Index: Source/core/inspector/InspectorConsoleAgent.cpp
diff --git a/Source/core/inspector/InspectorConsoleAgent.cpp b/Source/core/inspector/InspectorConsoleAgent.cpp
index 37cc22a726aec11ae4870f8f159d5405f52b54b1..c5c55b610d82c8ad0e0ae139e668fcec77092fad 100644
--- a/Source/core/inspector/InspectorConsoleAgent.cpp
+++ b/Source/core/inspector/InspectorConsoleAgent.cpp
@@ -73,12 +73,20 @@ InspectorConsoleAgent::InspectorConsoleAgent(InspectorTimelineAgent* timelineAge
 
 InspectorConsoleAgent::~InspectorConsoleAgent()
 {
+#if !ENABLE(OILPAN)
     m_instrumentingAgents->setInspectorConsoleAgent(0);
-    m_instrumentingAgents = 0;
+    m_instrumentingAgents = nullptr;
+#endif
     m_state = 0;
     m_injectedScriptManager = 0;
 }
 
+void InspectorConsoleAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_timelineAgent);
+    InspectorBaseAgent::trace(visitor);
+}
+
 void InspectorConsoleAgent::init()
 {
     m_instrumentingAgents->setInspectorConsoleAgent(this);