Remove libs/clock in favor of luci-go/common/clock.

go/src/infra/libs/clock/testclock/testtimer.go

-// 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.
-
-package testclock
-
-import (
-        "time"
-
-        "infra/libs/clock"
-)
-
-// timer is an implementation of clock.TestTimer that uses a channel
-// to signal the timer to fire.
-//
-// The channel is buffered so it can be used without requiring a separate signalling
-// goroutine.
-type timer struct {
-        clock   *testClock     // The underlying test clock instance.
-        signalC chan time.Time // Underlying signal channel.
-
-        // Cancels callback from clock.invokeAt. Being not nil implies that the timer
-        // is active.
-        cancelFunc cancelFunc
-}
-
-var _ clock.Timer = (*timer)(nil)
-
-// NewTimer returns a new, instantiated timer.
-func newTimer(clock *testClock) clock.Timer {
-        t := timer{
-                clock: clock,
-        }
-        return &t
-}
-
-func (t *timer) GetC() (c <-chan time.Time) {
-        if t.cancelFunc != nil {
-                c = t.signalC
-        }
-        return
-}
-
-func (t *timer) Reset(d time.Duration) (active bool) {
-        now := t.clock.Now()
-        triggerTime := now.Add(d)
-
-        // Signal our timerSet callback.
-        t.clock.signalTimerSet(t)
-
-        // Stop our current polling goroutine, if it's running.
-        active = t.Stop()
-
-        // Set timer properties.
-        t.signalC = make(chan time.Time, 1)
-        t.cancelFunc = t.clock.invokeAt(triggerTime, t.signal)
-        return
-}
-
-func (t *timer) Stop() bool {
-        // If the timer is not running, we're done.
-        if t.cancelFunc == nil {
-                return false
-        }
-
-        // Clear our state.
-        t.cancelFunc()
-        t.cancelFunc = nil
-        return true
-}
-
-// Sends a single signal, clearing the channel afterwards.
-func (t *timer) signal(now time.Time) {
-        if t.signalC != nil {
-                t.signalC <- now
-        }
-}