scheduler: Allow timer task to be nested

components/scheduler/child/web_scheduler_impl.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/web_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "components/scheduler/child/worker_scheduler.h"
 #include "third_party/WebKit/public/platform/WebTraceLocation.h"
@@ skipping 83 matching lines @@
 }
 
 void WebSchedulerImpl::postTimerTask(
     const blink::WebTraceLocation& web_location,
     blink::WebThread::Task* task,
     long long delayMs) {
   DCHECK(timer_task_runner_);
   scoped_ptr<blink::WebThread::Task> scoped_task(task);
   tracked_objects::Location location(web_location.functionName(),
                                      web_location.fileName(), -1, nullptr);
-  // Timer tasks should not run in a nested messageloop.
-  timer_task_runner_->PostNonNestableDelayedTask(
+  timer_task_runner_->PostDelayedTask(
       location,
       base::Bind(&WebSchedulerImpl::runTask, base::Passed(&scoped_task)),
       base::TimeDelta::FromMilliseconds(delayMs));
 }
 
 }  // namespace scheduler