[Try # 3] Scheduler refactoring to virtually eliminate redundant DoWorks

cc/test/ordered_simple_task_runner.h

Index: cc/test/ordered_simple_task_runner.h
diff --git a/cc/test/ordered_simple_task_runner.h b/cc/test/ordered_simple_task_runner.h
index 9620a96058df422e00c841a5512bca675422d9f0..7fd4a0412c7c43bd9b519f6fa8e4088202a63da1 100644
--- a/cc/test/ordered_simple_task_runner.h
+++ b/cc/test/ordered_simple_task_runner.h
@@ -77,8 +77,8 @@ class OrderedSimpleTaskRunner : public base::SingleThreadTaskRunner {
     advance_now_ = advance_now;
   }
 
-  size_t NumPendingTasks() const;
-  bool HasPendingTasks() const;
+  size_t NumPendingTasks();
+  bool HasPendingTasks();
   base::TimeTicks NextTaskTime();
   base::TimeDelta DelayToNextTaskTime();
 
@@ -136,6 +136,7 @@ class OrderedSimpleTaskRunner : public base::SingleThreadTaskRunner {
       const std::set<TestOrderablePendingTask>& existing_tasks);
   bool NowBeforeCallback(base::TimeTicks stop_at);
   bool AdvanceNowCallback();
+  void RemovePendingCancelledTasks();
 
   ~OrderedSimpleTaskRunner() override;