Move blink scheduler implementation into a component

components/scheduler/child/prioritizing_task_queue_selector.cc

 // Copyright 2014 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/prioritizing_task_queue_selector.h"
+#include "components/scheduler/child/prioritizing_task_queue_selector.h"
 
 #include "base/logging.h"
 #include "base/pending_task.h"
 #include "base/trace_event/trace_event_argument.h"
 
-namespace content {
+namespace scheduler {
 
 PrioritizingTaskQueueSelector::PrioritizingTaskQueueSelector()
     : starvation_count_(0), task_queue_selector_observer_(nullptr) {
 }
 
 PrioritizingTaskQueueSelector::~PrioritizingTaskQueueSelector() {
 }
 
 void PrioritizingTaskQueueSelector::RegisterWorkQueues(
     const std::vector<const base::TaskQueue*>& work_queues) {
@@ skipping 160 matching lines @@
   }
   state->EndDictionary();
   state->SetInteger("starvation_count", starvation_count_);
 }
 
 void PrioritizingTaskQueueSelector::SetTaskQueueSelectorObserver(
     Observer* observer) {
   task_queue_selector_observer_ = observer;
 }
 
-}  // namespace content
+}  // namespace scheduler