Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorPageAgent.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 224 matching lines @@
 bool InspectorPageAgent::dataContent(const char* data, unsigned size, const String& textEncodingName, bool withBase64Encode, String* result)
 {
     if (withBase64Encode) {
         *result = base64Encode(data, size);
         return true;
     }
 
     return decodeBuffer(data, size, textEncodingName, result);
 }
 
-PassOwnPtr<InspectorPageAgent> InspectorPageAgent::create(Page* page, InjectedScriptManager* injectedScriptManager, InspectorClient* client, InspectorOverlay* overlay)
+PassOwnPtrWillBeRawPtr<InspectorPageAgent> InspectorPageAgent::create(Page* page, InjectedScriptManager* injectedScriptManager, InspectorClient* client, InspectorOverlay* overlay)
 {
-    return adoptPtr(new InspectorPageAgent(page, injectedScriptManager, client, overlay));
+    return adoptPtrWillBeNoop(new InspectorPageAgent(page, injectedScriptManager, client, overlay));
 }
 
 // static
 void InspectorPageAgent::resourceContent(ErrorString* errorString, LocalFrame* frame, const KURL& url, String* result, bool* base64Encoded)
 {
     DocumentLoader* loader = assertDocumentLoader(errorString, frame);
     if (!loader)
         return;
     if (!cachedResourceContent(cachedResource(frame, url), result, base64Encoded))
         *errorString = "No resource with given URL found";
@@ skipping 996 matching lines @@
     }
     return true;
 }
 
 void InspectorPageAgent::setShowViewportSizeOnResize(ErrorString*, bool show, const bool* showGrid)
 {
     m_state->setBoolean(PageAgentState::showSizeOnResize, show);
     m_state->setBoolean(PageAgentState::showGridOnResize, showGrid && *showGrid);
 }
 
+void InspectorPageAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace WebCore