Revert of Add task location information to WorkerThread

Source/core/workers/WorkerThread.h

Index: Source/core/workers/WorkerThread.h
diff --git a/Source/core/workers/WorkerThread.h b/Source/core/workers/WorkerThread.h
index 3c318dd5f45b1eb38622fc0e7cee8377039d0542..3e4addbdd49ff2e600b182d194db60c82a2ba575 100644
--- a/Source/core/workers/WorkerThread.h
+++ b/Source/core/workers/WorkerThread.h
@@ -83,8 +83,8 @@
 
     WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; }
 
-    void postTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>);
-    void postDebuggerTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>);
+    void postTask(PassOwnPtr<ExecutionContextTask>);
+    void postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
 
     enum WaitMode { WaitForMessage, DontWaitForMessage };
     MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
@@ -123,7 +123,7 @@
     void initialize();
     void cleanup();
     void idleHandler();
-    void postDelayedTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>, long long delayMs);
+    void postDelayedTask(PassOwnPtr<ExecutionContextTask>, long long delayMs);
 
     bool m_terminated;
     OwnPtr<WorkerSharedTimer> m_sharedTimer;