Revert of Add task location information to ExecutionContext

Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * Copyright (C) 2013 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 249 matching lines @@
 void WebEmbeddedWorkerImpl::postMessageToPageInspector(const String& message)
 {
     WorkerInspectorProxy::PageInspector* pageInspector = m_workerInspectorProxy->pageInspector();
     if (!pageInspector)
         return;
     pageInspector->dispatchMessageFromWorker(message);
 }
 
 void WebEmbeddedWorkerImpl::postTaskToLoader(PassOwnPtr<ExecutionContextTask> task)
 {
-    toWebLocalFrameImpl(m_mainFrame)->frame()->document()->postTask(FROM_HERE, task);
+    toWebLocalFrameImpl(m_mainFrame)->frame()->document()->postTask(task);
 }
 
 bool WebEmbeddedWorkerImpl::postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask> task)
 {
     if (m_askedToTerminate || !m_workerThread)
         return false;
 
     m_workerThread->postTask(task);
     return !m_workerThread->terminated();
 }
@@ skipping 148 matching lines @@
     m_mainScriptLoader.clear();
 
     m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *document, *m_workerContextClient);
     m_loaderProxy = WorkerLoaderProxy::create(this);
     m_workerThread = ServiceWorkerThread::create(m_loaderProxy, *m_workerGlobalScopeProxy, startupData.release());
     m_workerThread->start();
     m_workerInspectorProxy->workerThreadCreated(document, m_workerThread.get(), scriptURL);
 }
 
 } // namespace blink