Implement WebFrameScheduler and WebPageScheduler

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 11431c3283bc1d4057a88a5c94f498bc810ad5ef..9b20cbd2b951acba2e1fb36e00ffa43c33a3c417 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.h
+++ b/components/scheduler/renderer/renderer_scheduler_impl.h
@@ -37,6 +37,9 @@ class SCHEDULER_EXPORT RendererSchedulerImpl : public RendererScheduler,
   scoped_refptr<base::SingleThreadTaskRunner> CompositorTaskRunner() override;
   scoped_refptr<base::SingleThreadTaskRunner> LoadingTaskRunner() override;
   scoped_refptr<TaskQueue> TimerTaskRunner() override;
+  scoped_refptr<TaskQueue> NewLoadingTaskRunner(const char* name) override;
+  scoped_refptr<TaskQueue> NewTimerTaskRunner(const char* name) override;
+  void UnregisterTaskRunner(scoped_refptr<TaskQueue>& task_queue) override;
   void WillBeginFrame(const cc::BeginFrameArgs& args) override;
   void BeginFrameNotExpectedSoon() override;
   void DidCommitFrameToCompositor() override;
@@ -203,8 +206,10 @@ class SCHEDULER_EXPORT RendererSchedulerImpl : public RendererScheduler,
 
   const scoped_refptr<TaskQueue> control_task_runner_;
   const scoped_refptr<TaskQueue> compositor_task_runner_;
-  const scoped_refptr<TaskQueue> loading_task_runner_;
-  const scoped_refptr<TaskQueue> timer_task_runner_;
+  std::set<scoped_refptr<TaskQueue>> loading_task_runners_;
+  std::set<scoped_refptr<TaskQueue>> timer_task_runners_;
+  scoped_refptr<TaskQueue> default_loading_task_runner_;
+  scoped_refptr<TaskQueue> default_timer_task_runner_;
 
   base::Closure update_policy_closure_;
   DeadlineTaskRunner delayed_update_policy_runner_;