Deprecate UnthrottledThreadTimer.

third_party/WebKit/Source/platform/Timer.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 163 matching lines @@
 
   Timer(TimerFiredClass* timerFiredClass, TimerFiredFunction timerFiredFunction)
       : TaskRunnerTimer<TimerFiredClass>(TimerBase::getTimerTaskRunner(),
                                          timerFiredClass,
                                          timerFiredFunction) {}
 };
 
 // This subclass of Timer posts its tasks on the current thread's default task
 // runner.  Tasks posted on there are not throttled when the tab is in the
 // background.
+//
+// DEPRECATED: Use TaskRunnerHelper::get with TaskType::Unthrottled.
 template <typename TimerFiredClass>
 class UnthrottledThreadTimer : public TaskRunnerTimer<TimerFiredClass> {
  public:
   using TimerFiredFunction =
       typename TaskRunnerTimer<TimerFiredClass>::TimerFiredFunction;
 
   ~UnthrottledThreadTimer() override {}
 
   UnthrottledThreadTimer(TimerFiredClass* timerFiredClass,
                          TimerFiredFunction timerFiredFunction)
       : TaskRunnerTimer<TimerFiredClass>(TimerBase::getUnthrottledTaskRunner(),
                                          timerFiredClass,
                                          timerFiredFunction) {}
 };
 
 NO_SANITIZE_ADDRESS
 inline bool TimerBase::isActive() const {
 #if DCHECK_IS_ON()
   DCHECK_EQ(m_thread, currentThread());
 #endif
   return m_weakPtrFactory.hasWeakPtrs();
 }
 
 }  // namespace blink
 
 #endif  // Timer_h