Make blink platform time consistent with the timer virtual time

components/scheduler/base/task_queue_manager_delegate.h

Index: components/scheduler/base/task_queue_manager_delegate.h
diff --git a/components/scheduler/base/task_queue_manager_delegate.h b/components/scheduler/base/task_queue_manager_delegate.h
index a93110e8ec17efcb3e7023b1a1c1de8435dea90c..fa4647df6e44770629d3c6baebaf9a4c87a08f14 100644
--- a/components/scheduler/base/task_queue_manager_delegate.h
+++ b/components/scheduler/base/task_queue_manager_delegate.h
@@ -29,6 +29,10 @@ class SCHEDULER_EXPORT TaskQueueManagerDelegate
   // this.
   virtual void OnNoMoreImmediateWork() = 0;
 
+  // Returns the time as a double which is the number of seconds since epoch
+  // (Jan 1, 1970).  Blink uses this format to represent time.
+  virtual double currentTime() const = 0;
+
  protected:
   ~TaskQueueManagerDelegate() override {}