Remove dependency on cc::TestNowSource from scheduler code

content/renderer/scheduler/renderer_scheduler_impl.h

Index: content/renderer/scheduler/renderer_scheduler_impl.h
diff --git a/content/renderer/scheduler/renderer_scheduler_impl.h b/content/renderer/scheduler/renderer_scheduler_impl.h
index 588bb9b94958a45d5b15961ad47ec0789389b2f1..b61829e1d0a86784c8f90c9accf02ddeb9d13354 100644
--- a/content/renderer/scheduler/renderer_scheduler_impl.h
+++ b/content/renderer/scheduler/renderer_scheduler_impl.h
@@ -19,6 +19,8 @@ class ConvertableToTraceFormat;
 
 namespace content {
 
+class TimeSource;
+
 class CONTENT_EXPORT RendererSchedulerImpl
     : public RendererScheduler,
       public SchedulerHelper::SchedulerHelperDelegate {
@@ -51,7 +53,7 @@ class CONTENT_EXPORT RendererSchedulerImpl
   void SuspendTimerQueue() override;
   void ResumeTimerQueue() override;
 
-  void SetTimeSourceForTesting(scoped_refptr<cc::TestNowSource> time_source);
+  void SetTimeSourceForTesting(scoped_ptr<TimeSource> time_source);
   void SetWorkBatchSizeForTesting(size_t work_batch_size);
   base::TimeTicks CurrentIdleTaskDeadlineForTesting() const;