scheduler: Make virtual time expiration deterministic

third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h

Index: third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h b/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
index d8697965c3c7fdb06d5d6f924f6dbe2b32f9295f..7fb63e8229c539da47544dc1920b7e00db8f239b 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/web_view_scheduler_impl.h
@@ -49,6 +49,9 @@ class BLINK_PLATFORM_EXPORT WebViewSchedulerImpl : public WebViewScheduler {
   void DisableVirtualTimeForTesting() override;
   bool VirtualTimeAllowedToAdvance() const override;
   void SetVirtualTimePolicy(VirtualTimePolicy virtual_time_policy) override;
+  void GrantVirtualTimeBudget(
+      base::TimeDelta budget,
+      std::unique_ptr<WTF::Closure> budget_exhausted_callback) override;
   void AudioStateChanged(bool is_audio_playing) override;
   bool HasActiveConnectionForTest() const override;
 
@@ -102,6 +105,8 @@ class BLINK_PLATFORM_EXPORT WebViewSchedulerImpl : public WebViewScheduler {
   WebScheduler::InterventionReporter* intervention_reporter_;  // Not owned.
   RendererSchedulerImpl* renderer_scheduler_;
   VirtualTimePolicy virtual_time_policy_;
+  RefPtr<WebTaskRunnerImpl> control_task_runner_;
+  TaskHandle virtual_time_budget_expired_task_handle_;
   int background_parser_count_;
   bool page_visible_;
   bool should_throttle_frames_;