base: Remove most uses of MessageLoopProxy

base/test/sequenced_worker_pool_owner.cc

 // Copyright (c) 2012 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 "base/test/sequenced_worker_pool_owner.h"
 
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 
 namespace base {
 
 SequencedWorkerPoolOwner::SequencedWorkerPoolOwner(
     size_t max_threads,
     const std::string& thread_name_prefix)
     : constructor_message_loop_(MessageLoop::current()),
       pool_(new SequencedWorkerPool(max_threads, thread_name_prefix, this)),
       has_work_call_count_(0) {}
 
@@ skipping 24 matching lines @@
 void SequencedWorkerPoolOwner::WillWaitForShutdown() {
   if (!will_wait_for_shutdown_callback_.is_null()) {
     will_wait_for_shutdown_callback_.Run();
 
     // Release the reference to the callback to prevent retain cycles.
     will_wait_for_shutdown_callback_ = Closure();
   }
 }
 
 void SequencedWorkerPoolOwner::OnDestruct() {
-  constructor_message_loop_->PostTask(
-      FROM_HERE,
-      constructor_message_loop_->QuitWhenIdleClosure());
+  constructor_message_loop_->task_runner()->PostTask(
+      FROM_HERE, constructor_message_loop_->QuitWhenIdleClosure());
 }
 
 }  // namespace base