Implement PostDelayedTaskAt for guaranteed timer ordering

components/scheduler/child/task_queue_manager_perftest.cc

 // 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 "components/scheduler/child/task_queue_manager.h"
 
 #include "base/bind.h"
 #include "base/threading/thread.h"
 #include "components/scheduler/child/scheduler_message_loop_delegate.h"
+#include "components/scheduler/child/task_queue.h"
 #include "components/scheduler/child/task_queue_selector.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/perf/perf_test.h"
 
 namespace scheduler {
 
 namespace {
 
 class SelectorForTest : public TaskQueueSelector {
  public:
@@ skipping 146 matching lines @@
   max_tasks_in_flight_ = 200;
   Benchmark("run 10000 delayed tasks with eight queues",
             base::Bind(&TaskQueueManagerPerfTest::ResetAndCallTestDelayedTask,
                        base::Unretained(this), 10000));
 }
 
 // TODO(alexclarke): Add additional tests with different mixes of non-delayed vs
 // delayed tasks.
 
 }  // namespace scheduler