Move blink scheduler implementation into a component

components/scheduler/child/time_source.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/child/scheduler/time_source.h"
+#include "components/scheduler/child/time_source.h"
 
-namespace content {
+namespace scheduler {
 
 TimeSource::TimeSource() {
 }
 
 TimeSource::~TimeSource() {
 }
 
 base::TimeTicks TimeSource::Now() const {
   return base::TimeTicks::Now();
 }
 
-}  // namespace content
+}  // namespace scheduler