[scheduler] Bunch of improvements for blink scheduler tracing

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

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h
index e2b62f7421cca1c78250dd195c5f6dd65fa93aab..0c16a7a95fa6c0bfeefee53eb1749180fa31295b 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.h
@@ -152,9 +152,6 @@ class BLINK_PLATFORM_EXPORT TaskQueueImpl final : public TaskQueue {
   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();
   }