[Reland] 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 da66808172335e0d9c06d968a0482f191a08d6fc..d69549329712c0d38865b4f485f1d868861205b3 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
@@ -177,6 +177,20 @@ class BLINK_PLATFORM_EXPORT TaskQueueImpl final : public TaskQueue {
   // TimeDomain. Must be called from the main thread.
   void WakeUpForDelayedWork(LazyNow* lazy_now);
 
+  base::TimeTicks time_domain_wakeup() const {
+    return main_thread_only().time_domain_wakeup;
+  }
+
+  void set_time_domain_wakeup(base::TimeTicks time_domain_wakeup) {
+    main_thread_only().time_domain_wakeup = time_domain_wakeup;
+  }
+
+  size_t heap_index() const { return main_thread_only().heap_index; }
+
+  void set_heap_index(size_t heap_index) {
+    main_thread_only().heap_index = heap_index;
+  }
+
  private:
   friend class WorkQueue;
   friend class WorkQueueTest;
@@ -215,9 +229,11 @@ class BLINK_PLATFORM_EXPORT TaskQueueImpl final : public TaskQueue {
     std::priority_queue<Task> delayed_incoming_queue;
     base::ObserverList<base::MessageLoop::TaskObserver> task_observers;
     size_t set_index;
+    size_t heap_index;
     bool is_enabled;
     base::trace_event::BlameContext* blame_context;  // Not owned.
     EnqueueOrder current_fence;
+    base::TimeTicks time_domain_wakeup;

[Sami, 2016/10/14 07:26:16]

It's a bit unclear what this is. |scheduled_time_domain_wakeup| maybe?

[alex clarke (OOO till 29th), 2016/10/14 13:55:35]

Done.

   };
 
   ~TaskQueueImpl() override;