[scheduler] Add WakeupBudgetPool.

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 928150038eb341fd3f9c7738f5336ff53d3187cb..6da9780ba5a8e61739758c0918bbc30b97de9191 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
@@ -156,6 +156,7 @@ class BLINK_PLATFORM_EXPORT TaskQueueImpl final : public TaskQueue {
   void SetBlameContext(base::trace_event::BlameContext* blame_context) override;
   void InsertFence(InsertFencePosition position) override;
   void RemoveFence() override;
+  bool HasFence() const override;
   bool BlockedByFence() const override;
   const char* GetName() const override;
   QueueType GetQueueType() const override;
@@ -260,6 +261,8 @@ class BLINK_PLATFORM_EXPORT TaskQueueImpl final : public TaskQueue {
     TaskQueueManager* task_queue_manager;
     TimeDomain* time_domain;
     Observer* observer;
+
+    base::Optional<EnqueueOrder> current_enqueue_order;
   };
 
   struct MainThreadOnly {