| // Copyright (c) 2012 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 "base/test/simple_test_tick_clock.h" | 
 |  | 
 | #include "base/logging.h" | 
 |  | 
 | namespace base { | 
 |  | 
 | SimpleTestTickClock::SimpleTestTickClock() = default; | 
 |  | 
 | SimpleTestTickClock::~SimpleTestTickClock() = default; | 
 |  | 
 | TimeTicks SimpleTestTickClock::NowTicks() const { | 
 |   AutoLock lock(lock_); | 
 |   return now_ticks_; | 
 | } | 
 |  | 
 | void SimpleTestTickClock::Advance(TimeDelta delta) { | 
 |   AutoLock lock(lock_); | 
 |   DCHECK(delta >= TimeDelta()); | 
 |   now_ticks_ += delta; | 
 | } | 
 |  | 
 | void SimpleTestTickClock::SetNowTicks(TimeTicks ticks) { | 
 |   AutoLock lock(lock_); | 
 |   now_ticks_ = ticks; | 
 | } | 
 |  | 
 | }  // namespace base |