Revert of Add task location information to ExecutionContext

Source/core/workers/WorkerThread.cpp

Index: Source/core/workers/WorkerThread.cpp
diff --git a/Source/core/workers/WorkerThread.cpp b/Source/core/workers/WorkerThread.cpp
index d41f74e492e7d804a97cc05a8755502408d86b24..78cbaa7aca315b566bc100f79965af4a5f82b13e 100644
--- a/Source/core/workers/WorkerThread.cpp
+++ b/Source/core/workers/WorkerThread.cpp
@@ -423,7 +423,7 @@
 
         // Stick a shutdown command at the end of the queue, so that we deal
         // with all the cleanup tasks the databases post first.
-        workerGlobalScope->postTask(FROM_HERE, WorkerThreadShutdownFinishTask::create());
+        workerGlobalScope->postTask(WorkerThreadShutdownFinishTask::create());
     }
 
     virtual bool isCleanupTask() const { return true; }