Remove dependency on cc::TestNowSource from scheduler code

content/renderer/scheduler/renderer_scheduler_impl.h

 // Copyright 2014 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 CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_IMPL_H_
 #define CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_IMPL_H_
 
 #include "base/atomicops.h"
 #include "base/synchronization/lock.h"
 #include "content/child/scheduler/scheduler_helper.h"
@@ skipping 33 matching lines @@
   bool IsHighPriorityWorkAnticipated() override;
   bool ShouldYieldForHighPriorityWork() override;
   bool CanExceedIdleDeadlineIfRequired() const override;
   void AddTaskObserver(base::MessageLoop::TaskObserver* task_observer) override;
   void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) override;
   void Shutdown() override;
   void SuspendTimerQueue() override;
   void ResumeTimerQueue() override;
 
-  void SetTimeSourceForTesting(scoped_refptr<cc::TestNowSource> time_source);
+  SchedulerHelper* GetSchedulerHelperForTesting();
   void SetWorkBatchSizeForTesting(size_t work_batch_size);
   base::TimeTicks CurrentIdleTaskDeadlineForTesting() const;
 
  private:
   friend class RendererSchedulerImplTest;
   friend class RendererSchedulerImplForTest;
 
   // Keep RendererSchedulerImpl::TaskQueueIdToString in sync with this enum.
   enum QueueId {
     COMPOSITOR_TASK_QUEUE = SchedulerHelper::TASK_QUEUE_COUNT,
@@ skipping 140 matching lines @@
   int timer_queue_suspend_count_;  // TIMER_TASK_QUEUE suspended if non-zero.
 
   base::WeakPtrFactory<RendererSchedulerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererSchedulerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_IMPL_H_