Revert of Add task location information to ExecutionContext

Source/core/workers/WorkerGlobalScope.h

Index: Source/core/workers/WorkerGlobalScope.h
diff --git a/Source/core/workers/WorkerGlobalScope.h b/Source/core/workers/WorkerGlobalScope.h
index 1f72cb287f10851653b32a545ee8dff0345449c2..072d3f198831c692bd877a051b90dfa30c69a95f 100644
--- a/Source/core/workers/WorkerGlobalScope.h
+++ b/Source/core/workers/WorkerGlobalScope.h
@@ -88,7 +88,7 @@
 
     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; }