Revert of Optimize blink scheduler with an intrusive heap

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 b702da23c6158f8bb121283d052a7795fedacc4f..da66808172335e0d9c06d968a0482f191a08d6fc 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
@@ -16,7 +16,6 @@
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "platform/scheduler/base/enqueue_order.h"
-#include "platform/scheduler/base/intrusive_heap.h"
 #include "public/platform/scheduler/base/task_queue.h"
 
 namespace blink {
@@ -178,22 +177,6 @@
   // TimeDomain. Must be called from the main thread.
   void WakeUpForDelayedWork(LazyNow* lazy_now);
 
-  base::TimeTicks scheduled_time_domain_wakeup() const {
-    return main_thread_only().scheduled_time_domain_wakeup;
-  }
-
-  void set_scheduled_time_domain_wakeup(
-      base::TimeTicks scheduled_time_domain_wakeup) {
-    main_thread_only().scheduled_time_domain_wakeup =
-        scheduled_time_domain_wakeup;
-  }
-
-  HeapHandle heap_handle() const { return main_thread_only().heap_handle; }
-
-  void set_heap_handle(HeapHandle heap_handle) {
-    main_thread_only().heap_handle = heap_handle;
-  }
-
  private:
   friend class WorkQueue;
   friend class WorkQueueTest;
@@ -232,11 +215,9 @@
     std::priority_queue<Task> delayed_incoming_queue;
     base::ObserverList<base::MessageLoop::TaskObserver> task_observers;
     size_t set_index;
-    HeapHandle heap_handle;
     bool is_enabled;
     base::trace_event::BlameContext* blame_context;  // Not owned.
     EnqueueOrder current_fence;
-    base::TimeTicks scheduled_time_domain_wakeup;
   };
 
   ~TaskQueueImpl() override;