Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

components/scheduler/renderer/web_view_scheduler_impl.h

Index: components/scheduler/renderer/web_view_scheduler_impl.h
diff --git a/components/scheduler/renderer/web_view_scheduler_impl.h b/components/scheduler/renderer/web_view_scheduler_impl.h
index f061517bad15bb455871d94e341f093f8b75a4d1..233c1dc29b2c6c561c239e61e05ccf42713360bf 100644
--- a/components/scheduler/renderer/web_view_scheduler_impl.h
+++ b/components/scheduler/renderer/web_view_scheduler_impl.h
@@ -44,8 +44,8 @@ class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
   std::unique_ptr<blink::WebFrameScheduler> createFrameScheduler(
       blink::BlameContext* blame_context) override;
   void enableVirtualTime() override;
-  void setAllowVirtualTimeToAdvance(
-      bool allow_virtual_time_to_advance) override;
+  bool virtualTimeAllowedToAdvance() const override;
+  void setVirtualTimePolicy(VirtualTimePolicy virtual_time_policy) override;
 
   // Virtual for testing.
   virtual void AddConsoleWarning(const std::string& message);
@@ -53,6 +53,9 @@ class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
   std::unique_ptr<WebFrameSchedulerImpl> createWebFrameSchedulerImpl(
       base::trace_event::BlameContext* blame_context);
 
+  void incrementPendingResourceLoadCount();
+  void decrementPendingResourceLoadCount();
+
  private:
   friend class WebFrameSchedulerImpl;
 
@@ -62,11 +65,15 @@ class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
     return virtual_time_domain_.get();
   }
 
+  void setAllowVirtualTimeToAdvance(bool allow_virtual_time_to_advance);
+
   std::set<WebFrameSchedulerImpl*> frame_schedulers_;
   std::unique_ptr<AutoAdvancingVirtualTimeDomain> virtual_time_domain_;
   TaskQueue::PumpPolicy virtual_time_pump_policy_;
   blink::WebView* web_view_;
   RendererSchedulerImpl* renderer_scheduler_;
+  int pending_resource_load_count_;
+  VirtualTimePolicy virtual_time_policy_;
   bool page_visible_;
   bool disable_background_timer_throttling_;
   bool allow_virtual_time_to_advance_;