Oilpan: Ensure that classes with virtual trace methods always have vtables for their left-most base…

Source/core/inspector/WorkerInspectorController.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 165 matching lines @@
 {
     m_workerDebuggerAgent->interruptAndDispatchInspectorCommands();
 }
 
 void WorkerInspectorController::trace(Visitor* visitor)
 {
     visitor->trace(m_workerGlobalScope);
     visitor->trace(m_state);
     visitor->trace(m_instrumentingAgents);
     visitor->trace(m_injectedScriptManager);
-    m_agents.trace(visitor);
+    visitor->trace(m_agents);
     visitor->trace(m_workerDebuggerAgent);
 }
 
 }