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"
 #include "components/scheduler/base/time_domain.h"
 
@@ skipping 89 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().time_domain->CreateLazyNow());
-  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().time_domain->CreateLazyNow());
   base::TimeTicks desired_run_time;
@@ skipping 87 matching lines @@
   {
     base::AutoLock lock(any_thread_lock_);
     if (any_thread().incoming_queue.empty()) {
       return QueueState::EMPTY;
     } else {
       return QueueState::NEEDS_PUMPING;
     }
   }
 }
 
+bool TaskQueueImpl::HasPendingDelayedTask() const {
+  base::AutoLock lock(any_thread_lock_);
+  return !any_thread().delayed_task_queue.empty();
+}
+
 bool TaskQueueImpl::TaskIsOlderThanQueuedTasks(const Task* task) {
   // A null task is passed when UpdateQueue is called before any task is run.
   // In this case we don't want to pump an after_wakeup queue, so return true
   // here.
   if (!task)
     return true;
 
   // Return false if there are no task in the incoming queue.
   if (any_thread().incoming_queue.empty())
     return false;
@@ skipping 312 matching lines @@
   state->EndDictionary();
 }
 
 size_t TaskQueueImpl::IncomingQueueSizeForTest() const {
   base::AutoLock lock(any_thread_lock_);
   return any_thread().incoming_queue.size();
 }
 
 }  // namespace internal
 }  // namespace scheduler