Move throttling of background timers into the renderer scheduler

components/scheduler/base/task_queue_impl.cc

Index: components/scheduler/base/task_queue_impl.cc
diff --git a/components/scheduler/base/task_queue_impl.cc b/components/scheduler/base/task_queue_impl.cc
index 651770740e8a2f7ba6527c25fd042425b0eba6ea..39289c2332989f877ea474479aa5330987fe1e5c 100644
--- a/components/scheduler/base/task_queue_impl.cc
+++ b/components/scheduler/base/task_queue_impl.cc
@@ -97,18 +97,6 @@ bool TaskQueueImpl::PostNonNestableDelayedTask(
   return PostDelayedTaskImpl(from_here, task, delay, TaskType::NON_NESTABLE);
 }
 
-bool TaskQueueImpl::PostDelayedTaskAt(
-    const tracked_objects::Location& from_here,
-    const base::Closure& task,
-    base::TimeTicks desired_run_time) {
-  base::AutoLock lock(any_thread_lock_);
-  if (!any_thread().task_queue_manager)
-    return false;
-  LazyNow lazy_now(any_thread().task_queue_manager->delegate().get());
-  return PostDelayedTaskLocked(&lazy_now, from_here, task, desired_run_time,
-                               TaskType::NORMAL);
-}
-
 bool TaskQueueImpl::PostDelayedTaskImpl(
     const tracked_objects::Location& from_here,
     const base::Closure& task,