Replaced TestNowSource with SimpleTestTickClock.

base/test/simple_test_tick_clock.cc

 // 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() {}
 
+SimpleTestTickClock::SimpleTestTickClock(int64_t initial) : now_ticks_() {
+  now_ticks_ = TimeTicks::FromInternalValue(initial);
+}
+
+SimpleTestTickClock::SimpleTestTickClock(TimeTicks initial) : now_ticks_() {
+  now_ticks_ = initial;
+}
+
 SimpleTestTickClock::~SimpleTestTickClock() {}
 
 TimeTicks SimpleTestTickClock::NowTicks() {
   AutoLock lock(lock_);
   return now_ticks_;
 }
 
+void SimpleTestTickClock::Set(TimeTicks time) {
+  AutoLock lock(lock_);
+  DCHECK(time >= now_ticks_);  // Time should always go forward.
+  now_ticks_ = time;
+}
+
 void SimpleTestTickClock::Advance(TimeDelta delta) {
   AutoLock lock(lock_);
   DCHECK(delta >= TimeDelta());
   now_ticks_ += delta;
 }
 
+// SimpleTestTickClock::Convenience functions
+void SimpleTestTickClock::AdvanceMicroseconds(int64_t period_in_microseconds) {
+  Advance(TimeDelta::FromMicroseconds(period_in_microseconds));
+}
+
+void SimpleTestTickClock::SetMicroseconds(int64_t time_in_microseconds) {
+  Set(TimeTicks::FromInternalValue(time_in_microseconds));
+}
+
 }  // namespace base