Move throttling of background timers into the renderer scheduler

components/scheduler/base/task_queue.h

 // 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.
 
 #ifndef COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_H_
 #define COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_H_
 
 #include "base/message_loop/message_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "components/scheduler/scheduler_export.h"
 
 namespace scheduler {
 
 class SCHEDULER_EXPORT TaskQueue : public base::SingleThreadTaskRunner {
  public:
   TaskQueue() {}
 
   // Unregisters the task queue after which no tasks posted to it will run and
   // the TaskQueueManager's reference to it will be released soon.
   virtual void UnregisterTaskQueue() = 0;
 
-  // Post a delayed task at an absolute desired run time instead of a time
-  // delta from the current time.
-  virtual bool PostDelayedTaskAt(const tracked_objects::Location& from_here,
-                                 const base::Closure& task,
-                                 base::TimeTicks desired_run_time) = 0;
-
   enum QueuePriority {
     // Queues with control priority will run before any other queue, and will
     // explicitly starve other queues. Typically this should only be used for
     // private queues which perform control operations.
     CONTROL_PRIORITY,
     // Queues with high priority will be selected preferentially over normal or
     // best effort queues. The selector will ensure that high priority queues
     // cannot completely starve normal priority queues.
     HIGH_PRIORITY,
     // Queues with normal priority are the default.
@@ skipping 137 matching lines @@
 
  protected:
   ~TaskQueue() override {}
 
   DISALLOW_COPY_AND_ASSIGN(TaskQueue);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_H_