Remove dependency on cc::TestNowSource from scheduler code

content/child/scheduler/worker_scheduler_impl.cc

 // 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.
 
 #include "content/child/scheduler/worker_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
@@ skipping 57 matching lines @@
     base::MessageLoop::TaskObserver* task_observer) {
   DCHECK(initialized_);
   helper_.RemoveTaskObserver(task_observer);
 }
 
 void WorkerSchedulerImpl::Shutdown() {
   DCHECK(initialized_);
   helper_.Shutdown();
 }
 
-void WorkerSchedulerImpl::SetTimeSourceForTesting(
-    scoped_refptr<cc::TestNowSource> time_source) {
-  helper_.SetTimeSourceForTesting(time_source);
+SchedulerHelper* WorkerSchedulerImpl::GetSchedulerHelperForTesting() {
+  return &helper_;
 }
 
 void WorkerSchedulerImpl::SetWorkBatchSizeForTesting(size_t work_batch_size) {
   helper_.SetWorkBatchSizeForTesting(work_batch_size);
 }
 
 bool WorkerSchedulerImpl::CanEnterLongIdlePeriod(base::TimeTicks,
                                                  base::TimeDelta*) {
   return true;
 }
 
 base::TimeTicks WorkerSchedulerImpl::CurrentIdleTaskDeadlineForTesting() const {
   base::TimeTicks deadline;
   helper_.CurrentIdleTaskDeadlineCallback(&deadline);
   return deadline;
 }
 
 }  // namespace content