[Reland] Dont post delayed DoWork for disabled queues.

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

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h
index 21c4aedc800ec0af9b8e848cf3d56a5873467575..360d062eea622ed9b28cea9944da1a59a7097a98 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.h
@@ -74,8 +74,12 @@ class BLINK_PLATFORM_EXPORT TaskQueueManager
   // runner. These delayed tasks are de-duplicated. Must be called on the thread
   // this class was created on.
   void MaybeScheduleDelayedWork(const tracked_objects::Location& from_here,
-                                base::TimeTicks now,
-                                base::TimeDelta delay);
+                                LazyNow* lazy_now,
+                                base::TimeTicks run_time);
+
+  // Cancels a delayed task to process work at |run_time|, previously requested
+  // with MaybeScheduleDelayedWork.
+  void CancelDelayedWork(base::TimeTicks run_time);

[Sami, 2017/01/27 12:36:25]

What if one time domain accidentally cancels the wakeup requested by another
one? Do we need some refcounting here?

[alex clarke (OOO till 29th), 2017/01/30 18:24:01]

As discussed offline I've added some code to track which time domain is
associated with the wakeup.

 
   // Set the number of tasks executed in a single invocation of the task queue
   // manager. Increasing the batch size can reduce the overhead of yielding