Move blink scheduler implementation into a component

content/renderer/scheduler/deadline_task_runner.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 "content/renderer/scheduler/deadline_task_runner.h"
-
-#include "base/bind.h"
-
-namespace content {
-
-DeadlineTaskRunner::DeadlineTaskRunner(
-    const base::Closure& callback,
-    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
-    : callback_(callback), task_runner_(task_runner) {
-  cancelable_run_internal_.Reset(
-      base::Bind(&DeadlineTaskRunner::RunInternal, base::Unretained(this)));
-}
-
-DeadlineTaskRunner::~DeadlineTaskRunner() {
-}
-
-void DeadlineTaskRunner::SetDeadline(const tracked_objects::Location& from_here,
-                                     base::TimeDelta delay,
-                                     base::TimeTicks now) {
-  DCHECK(delay > base::TimeDelta());
-  base::TimeTicks deadline = now + delay;
-  if (deadline_.is_null() || deadline < deadline_) {
-    deadline_ = deadline;
-    cancelable_run_internal_.Cancel();
-    task_runner_->PostDelayedTask(from_here,
-                                  cancelable_run_internal_.callback(), delay);
-  }
-}
-
-void DeadlineTaskRunner::RunInternal() {
-  deadline_ = base::TimeTicks();
-  callback_.Run();
-}
-
-}  // namespace content