Try a different way of unregistering TaskQueues from ThrottlingHelper

components/scheduler/renderer/web_frame_scheduler_impl.cc

Index: components/scheduler/renderer/web_frame_scheduler_impl.cc
diff --git a/components/scheduler/renderer/web_frame_scheduler_impl.cc b/components/scheduler/renderer/web_frame_scheduler_impl.cc
index c3d484b39a9ee8bff68548d82a3c43657eeaf3be..ce3f201bb529c241c0e3bfbd0acbb371d9c6f8af 100644
--- a/components/scheduler/renderer/web_frame_scheduler_impl.cc
+++ b/components/scheduler/renderer/web_frame_scheduler_impl.cc
@@ -25,11 +25,8 @@ WebFrameSchedulerImpl::~WebFrameSchedulerImpl() {
   if (loading_task_queue_.get())
     loading_task_queue_->UnregisterTaskQueue();
 
-  if (timer_task_queue_.get()) {
-    renderer_scheduler_->throttling_helper()->DecreaseThrottleRefCount(
-        timer_task_queue_.get());
+  if (timer_task_queue_.get())
     timer_task_queue_->UnregisterTaskQueue();
-  }
 
   if (parent_web_view_scheduler_)
     parent_web_view_scheduler_->Unregister(this);