Revert of Add task location information to ExecutionContext

Source/core/workers/WorkerGlobalScope.h

 /*
  * Copyright (C) 2008, 2009 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 70 matching lines @@
 
     WorkerScriptController* script() { return m_script.get(); }
     void clearScript() { m_script.clear(); }
     void clearInspector();
 
     virtual void didEvaluateWorkerScript();
     void dispose();
 
     WorkerThread* thread() const { return m_thread; }
 
-    virtual void postTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>) override final; // Executes the task on context's thread asynchronously.
+    virtual void postTask(PassOwnPtr<ExecutionContextTask>) override final; // Executes the task on context's thread asynchronously.
 
     // WorkerGlobalScope
     WorkerGlobalScope* self() { return this; }
     WorkerConsole* console();
     WorkerLocation* location() const;
     void close();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
 
     // WorkerUtils
@@ skipping 81 matching lines @@
 
     unsigned long m_workerExceptionUniqueIdentifier;
     WillBeHeapHashMap<unsigned long, RefPtrWillBeMember<ConsoleMessage>> m_pendingMessages;
 };
 
 DEFINE_TYPE_CASTS(WorkerGlobalScope, ExecutionContext, context, context->isWorkerGlobalScope(), context.isWorkerGlobalScope());
 
 } // namespace blink
 
 #endif // WorkerGlobalScope_h