Move throttling of background timers into the renderer scheduler

components/scheduler/base/task_queue_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/scheduler/base/task_queue_impl.h"
 
 #include "components/scheduler/base/task_queue_manager.h"
 #include "components/scheduler/base/task_queue_manager_delegate.h"
 
 namespace scheduler {
@@ skipping 79 matching lines @@
   return PostDelayedTaskImpl(from_here, task, delay, TaskType::NORMAL);
 }
 
 bool TaskQueueImpl::PostNonNestableDelayedTask(
     const tracked_objects::Location& from_here,
     const base::Closure& task,
     base::TimeDelta delay) {
   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,
     base::TimeDelta delay,
     TaskType task_type) {
   base::AutoLock lock(any_thread_lock_);
   if (!any_thread().task_queue_manager)
     return false;
   LazyNow lazy_now(any_thread().task_queue_manager->delegate().get());
   base::TimeTicks desired_run_time;
@@ skipping 389 matching lines @@
   state->SetBoolean("nestable", task.nestable);
   state->SetBoolean("is_high_res", task.is_high_res);
   state->SetDouble(
       "delayed_run_time",
       (task.delayed_run_time - base::TimeTicks()).InMicroseconds() / 1000.0L);
   state->EndDictionary();
 }
 
 }  // namespace internal
 }  // namespace scheduler