Revert of compositor-worker: Refactor CompositorWorkerManager

components/scheduler/child/webthread_impl_for_worker_scheduler.cc

Index: components/scheduler/child/webthread_impl_for_worker_scheduler.cc
diff --git a/components/scheduler/child/webthread_impl_for_worker_scheduler.cc b/components/scheduler/child/webthread_impl_for_worker_scheduler.cc
index 4c8335edd0dc000236a445fc856d021ee7c753ed..8cd69b80d0d7d7a760d869b2e17ef2a29db60e2f 100644
--- a/components/scheduler/child/webthread_impl_for_worker_scheduler.cc
+++ b/components/scheduler/child/webthread_impl_for_worker_scheduler.cc
@@ -20,13 +20,8 @@
 
 WebThreadImplForWorkerScheduler::WebThreadImplForWorkerScheduler(
     const char* name)
-    : WebThreadImplForWorkerScheduler(name, base::Thread::Options()) {}
-
-WebThreadImplForWorkerScheduler::WebThreadImplForWorkerScheduler(
-    const char* name,
-    base::Thread::Options options)
-    : thread_(new base::Thread(name ? name : std::string())) {
-  thread_->StartWithOptions(options);
+    : thread_(new base::Thread(name)) {
+  thread_->Start();
   thread_task_runner_ = thread_->task_runner();
 
   base::WaitableEvent completion(false, false);