Revert of Adds TimeDomains to the TaskQueueManager

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 TimeDomain;
 
 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
@@ skipping 72 matching lines @@
   // Options for constructing a TaskQueue. Once set the |name|,
   // |should_monitor_quiescence| and |wakeup_policy| are immutable. The
   // |pump_policy| can be mutated with |SetPumpPolicy()|.
   struct Spec {
     // Note |name| must have application lifetime.
     explicit Spec(const char* name)
         : name(name),
           should_monitor_quiescence(false),
           pump_policy(TaskQueue::PumpPolicy::AUTO),
           wakeup_policy(TaskQueue::WakeupPolicy::CAN_WAKE_OTHER_QUEUES),
-          time_domain(nullptr),
           should_notify_observers(true) {}
 
     Spec SetShouldMonitorQuiescence(bool should_monitor) {
       should_monitor_quiescence = should_monitor;
       return *this;
     }
 
     Spec SetPumpPolicy(PumpPolicy policy) {
       pump_policy = policy;
       return *this;
     }
 
     Spec SetWakeupPolicy(WakeupPolicy policy) {
       wakeup_policy = policy;
       return *this;
     }
 
     Spec SetShouldNotifyObservers(bool run_observers) {
       should_notify_observers = run_observers;
       return *this;
     }
 
-    Spec SetTimeDomain(TimeDomain* domain) {
-      time_domain = domain;
-      return *this;
-    }
-
     const char* name;
     bool should_monitor_quiescence;
     TaskQueue::PumpPolicy pump_policy;
     TaskQueue::WakeupPolicy wakeup_policy;
-    TimeDomain* time_domain;
     bool should_notify_observers;
   };
 
   // Returns true if the queue priority is not
   // TaskQueueSelector::DISABLED_PRIORITY. NOTE this must be called on the
   // thread this TaskQueue was created by.
   virtual bool IsQueueEnabled() const = 0;
 
   // Returns true if there no tasks in either the work or incoming task queue.
   // Note that this function involves taking a lock, so calling it has some
@@ skipping 25 matching lines @@
   // called on the thread this TaskQueue was created by.
   virtual void PumpQueue() = 0;
 
   // These functions can only be called on the same thread that the task queue
   // manager executes its tasks on.
   virtual void AddTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) = 0;
   virtual void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) = 0;
 
-  // Removes the task queue from the previous TimeDomain and adds it to
-  // |domain|.  This is a moderately expensive operation.
-  virtual void SetTimeDomain(const scoped_refptr<TimeDomain>& domain) = 0;
-
  protected:
   ~TaskQueue() override {}
 
   DISALLOW_COPY_AND_ASSIGN(TaskQueue);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_H_