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

base/task_scheduler/scheduler_lock_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/scheduler_lock.h"
 
 #include <stdlib.h>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/rand_util.h"
 #include "base/synchronization/waitable_event.h"
-#include "base/task_scheduler/test_utils.h"
+#include "base/test/gtest_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/simple_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace internal {
 namespace {
 
 // Adapted from base::Lock's BasicLockTestThread to make sure
 // Acquire()/Release() don't crash.
@@ skipping 263 matching lines @@
     SchedulerLock lock4;
     SchedulerLock lock5;
   };
 
   EXPECT_DCHECK_DEATH({ LockCycle cycle; }, "");
 }
 
 }  // namespace
 }  // namespace internal
 }  // namespace base