Revert of Change VirtualTimePolicy::PAUSE_IF_NETWORK_FETCHES_PENDING

components/scheduler/renderer/renderer_scheduler_impl.h

Index: components/scheduler/renderer/renderer_scheduler_impl.h
diff --git a/components/scheduler/renderer/renderer_scheduler_impl.h b/components/scheduler/renderer/renderer_scheduler_impl.h
index dad69eea94b39f139d6d2b597ca7a5b75fe6930b..d662dd45247bfbc44717b04897dc22e3ae2eed74 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.h
+++ b/components/scheduler/renderer/renderer_scheduler_impl.h
@@ -31,7 +31,6 @@
 }
 
 namespace scheduler {
-class AutoAdvancingVirtualTimeDomain;
 class RenderWidgetSchedulingState;
 class WebViewSchedulerImpl;
 class ThrottlingHelper;
@@ -145,9 +144,6 @@
   void RegisterTimeDomain(TimeDomain* time_domain);
   void UnregisterTimeDomain(TimeDomain* time_domain);
 
-  // Tells the scheduler that all TaskQueues should use virtual time.
-  void EnableVirtualTime();
-
   void SetExpensiveTaskBlockingAllowed(bool allowed);
 
   void AddWebViewScheduler(WebViewSchedulerImpl* web_view_scheduler);
@@ -172,8 +168,6 @@
     return helper_.real_time_domain();
   }
 
-  AutoAdvancingVirtualTimeDomain* GetVirtualTimeDomain();
-
   ThrottlingHelper* throttling_helper() { return throttling_helper_.get(); }
 
  private:
@@ -186,7 +180,6 @@
   enum class TimeDomainType {
     REAL,
     THROTTLED,
-    VIRTUAL,
   };
 
   struct TaskQueuePolicy {
@@ -361,12 +354,8 @@
   const scoped_refptr<TaskQueue> compositor_task_runner_;
   std::set<scoped_refptr<TaskQueue>> loading_task_runners_;
   std::set<scoped_refptr<TaskQueue>> timer_task_runners_;
-  std::set<scoped_refptr<TaskQueue>> unthrottled_task_runners_;
   scoped_refptr<TaskQueue> default_loading_task_runner_;
   scoped_refptr<TaskQueue> default_timer_task_runner_;
-
-  // Note |virtual_time_domain_| is lazily created.
-  std::unique_ptr<AutoAdvancingVirtualTimeDomain> virtual_time_domain_;
 
   base::Closure update_policy_closure_;
   DeadlineTaskRunner delayed_update_policy_runner_;
@@ -412,7 +401,6 @@
     bool begin_frame_not_expected_soon;
     bool expensive_task_blocking_allowed;
     bool in_idle_period_for_testing;
-    bool use_virtual_time;
     std::set<WebViewSchedulerImpl*> web_view_schedulers;  // Not owned.
     RAILModeObserver* rail_mode_observer;                 // Not owned.
   };