Revert of Move throttling of background timers into the renderer scheduler

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/web_task_runner_impl.h"
 #include "components/scheduler/child/worker_scheduler.h"
@@ skipping 69 matching lines @@
 }
 
 blink::WebTaskRunner* WebSchedulerImpl::loadingTaskRunner() {
   return loading_web_task_runner_.get();
 }
 
 blink::WebTaskRunner* WebSchedulerImpl::timerTaskRunner() {
   return timer_web_task_runner_.get();
 }
 
+void WebSchedulerImpl::postTimerTaskAt(
+    const blink::WebTraceLocation& web_location,
+    blink::WebTaskRunner::Task* task,
+    double monotonicTime) {
+  DCHECK(timer_task_runner_);
+  tracked_objects::Location location(web_location.functionName(),
+                                     web_location.fileName(), -1, nullptr);
+  timer_task_runner_->PostDelayedTaskAt(
+      location,
+      base::Bind(&WebTaskRunnerImpl::runTask,
+                 base::Passed(scoped_ptr<blink::WebTaskRunner::Task>(task))),
+      base::TimeTicks() + base::TimeDelta::FromSecondsD(monotonicTime));
+}
+
 blink::WebPassOwnPtr<blink::WebViewScheduler>
 WebSchedulerImpl::createWebViewScheduler(blink::WebView*) {
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace scheduler