Make blink platform time consistent with the timer virtual time

components/scheduler/renderer/renderer_scheduler.h

Index: components/scheduler/renderer/renderer_scheduler.h
diff --git a/components/scheduler/renderer/renderer_scheduler.h b/components/scheduler/renderer/renderer_scheduler.h
index 4f7da03be5ec5d53b7bcc87dfed6fd99dd522252..5f7b0a5bbb8baaad38855589ee4685fa42461dd5 100644
--- a/components/scheduler/renderer/renderer_scheduler.h
+++ b/components/scheduler/renderer/renderer_scheduler.h
@@ -144,6 +144,12 @@ class SCHEDULER_EXPORT RendererScheduler : public ChildScheduler {
   // received via OnRendererBackgrounded. Defaults to disabled.
   virtual void SetTimerQueueSuspensionWhenBackgroundedEnabled(bool enabled) = 0;
 
+  // Returns a double which is the number of seconds since epoch (Jan 1, 1970).
+  virtual double CurrentTimeSeconds() const = 0;
+
+  // Returns a microsecond resolution platform dependant time source.
+  virtual double MonotonicallyIncreasingTimeSeconds() const = 0;
+
  protected:
   RendererScheduler();
   DISALLOW_COPY_AND_ASSIGN(RendererScheduler);