scheduler: Add an unthrottled per-frame task runner

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 75ded915c014ca94d7ec94b8cca89484dfc0d8be..0f9d623b11c22a2c3d9ddd7891c286e7062b2dcf 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.h
+++ b/components/scheduler/renderer/renderer_scheduler_impl.h
@@ -82,6 +82,7 @@ class SCHEDULER_EXPORT RendererSchedulerImpl
   scoped_refptr<TaskQueue> TimerTaskRunner() override;
   scoped_refptr<TaskQueue> NewLoadingTaskRunner(const char* name) override;
   scoped_refptr<TaskQueue> NewTimerTaskRunner(const char* name) override;
+  scoped_refptr<TaskQueue> NewUnthrottledTaskRunner(const char* name) override;
   std::unique_ptr<RenderWidgetSchedulingState> NewRenderWidgetSchedulingState()
       override;
   void WillBeginFrame(const cc::BeginFrameArgs& args) override;