Remove TaskScheduler::CreateAndSetDefaultTaskScheduler().

base/test/scoped_task_environment.cc

Index: base/test/scoped_task_environment.cc
diff --git a/base/test/scoped_task_environment.cc b/base/test/scoped_task_environment.cc
index 1e8782e355433c353ba7328f0e2619898b8a42fd..af871e6a11d4c273197960d73ed3a1a227d32c86 100644
--- a/base/test/scoped_task_environment.cc
+++ b/base/test/scoped_task_environment.cc
@@ -27,10 +27,10 @@ ScopedTaskEnvironment::ScopedTaskEnvironment(MainThreadType main_thread_type)
   const SchedulerWorkerPoolParams worker_pool_params(
       SchedulerWorkerPoolParams::StandbyThreadPolicy::ONE, kMaxThreads,
       kSuggestedReclaimTime);
-  TaskScheduler::CreateAndSetDefaultTaskScheduler(
-      "ScopedTaskEnvironment", {worker_pool_params, worker_pool_params,
-                                worker_pool_params, worker_pool_params});
+  TaskScheduler::Create("ScopedTaskEnvironment");
   task_scheduler_ = TaskScheduler::GetInstance();
+  TaskScheduler::GetInstance()->Start({worker_pool_params, worker_pool_params,
+                                       worker_pool_params, worker_pool_params});
 }
 
 ScopedTaskEnvironment::~ScopedTaskEnvironment() {