Make blink platform time consistent with the timer virtual time

components/scheduler/base/task_queue_manager_delegate.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_H_
 #define COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 11 matching lines @@
   // Returns true if the task runner is nested (i.e., running a run loop within
   // a nested task).
   virtual bool IsNested() const = 0;
 
   // Used by the TaskQueueManager to tell us there is no more non-delayed work
   // to do.
   // TODO(alexclarke): Try and find a better interface that avoids the need for
   // 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 CurrentTimeSeconds() const = 0;
+
  protected:
   ~TaskQueueManagerDelegate() override {}
 
   DISALLOW_COPY_AND_ASSIGN(TaskQueueManagerDelegate);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_H_