Move EXPECT_DCHECK_DEATH from base/task_scheduler and use it in relevant base/ tests

base/task_scheduler/task_tracker_unittest.cc

 // Copyright 2016 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/task_scheduler/task_tracker.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/sequence_token.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/task_scheduler/scheduler_lock.h"
 #include "base/task_scheduler/sequence.h"
 #include "base/task_scheduler/task.h"
 #include "base/task_scheduler/task_traits.h"
-#include "base/task_scheduler/test_utils.h"
+#include "base/test/gtest_util.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/sequenced_task_runner_handle.h"
 #include "base/threading/simple_thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace internal {
@@ skipping 603 matching lines @@
 
   // Unblock shutdown by running |block_shutdown_task|.
   tracker_.RunNextTaskInSequence(
       CreateSequenceWithTask(std::move(block_shutdown_task)).get());
   EXPECT_EQ(kLoadTestNumIterations + 1, NumTasksExecuted());
   WAIT_FOR_ASYNC_SHUTDOWN_COMPLETED();
 }
 
 }  // namespace internal
 }  // namespace base