[scheduler] Bunch of improvements for blink scheduler tracing

third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h

 // 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.
 
 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_IMPL_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 134 matching lines @@
   QueueType GetQueueType() const override;
 
   void AsValueInto(base::trace_event::TracedValue* state) const;
 
   bool GetQuiescenceMonitored() const { return should_monitor_quiescence_; }
   bool GetShouldNotifyObservers() const { return should_notify_observers_; }
 
   void NotifyWillProcessTask(const base::PendingTask& pending_task);
   void NotifyDidProcessTask(const base::PendingTask& pending_task);
 
-  // Can be called on any thread.
-  static const char* PriorityToString(TaskQueue::QueuePriority priority);
-
   WorkQueue* delayed_work_queue() {
     return main_thread_only().delayed_work_queue.get();
   }
 
   const WorkQueue* delayed_work_queue() const {
     return main_thread_only().delayed_work_queue.get();
   }
 
   WorkQueue* immediate_work_queue() {
     return main_thread_only().immediate_work_queue.get();
@@ skipping 151 matching lines @@
   const bool should_report_when_execution_blocked_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskQueueImpl);
 };
 
 }  // namespace internal
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TASK_QUEUE_IMPL_H_