Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorInputAgent.cpp

 /*
  * Copyright (C) 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 252 matching lines @@
         IntPoint convertedPoint, globalPoint;
         ConvertInspectorPoint(m_page, IntPoint(x, y), &convertedPoint, &globalPoint);
 
         SyntheticInspectorTouchPoint point(id++, convertedState, globalPoint, convertedPoint, radiusX, radiusY, rotationAngle, force);
         event.append(point);
     }
 
     m_page->mainFrame()->eventHandler().handleTouchEvent(event);
 }
 
+void InspectorInputAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace WebCore