Revert of Make WebTraceLocation be an alias of tracked_objects::Location

third_party/WebKit/Source/platform/threading/BackgroundTaskRunner.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/threading/BackgroundTaskRunner.h"
 
 #include "base/location.h"
 #include "base/threading/worker_pool.h"
 #include "public/platform/WebTraceLocation.h"
 
 namespace blink {
 
 void BackgroundTaskRunner::postOnBackgroundThread(const WebTraceLocation& location, std::unique_ptr<CrossThreadClosure> closure, TaskSize taskSize)
 {
-    base::WorkerPool::PostTask(location, convertToBaseCallback(std::move(closure)), taskSize == TaskSizeLongRunningTask);
+    tracked_objects::Location baseLocation(location.functionName(), location.fileName(), 0, nullptr);
+    base::WorkerPool::PostTask(baseLocation, convertToBaseCallback(std::move(closure)), taskSize == TaskSizeLongRunningTask);
 }
 
 } // namespace blink