Add a new TickTimer class to NetEq

webrtc/modules/audio_coding/neteq/tick_timer.cc

Index: webrtc/modules/audio_coding/neteq/tick_timer.cc
diff --git a/webrtc/modules/audio_coding/neteq/tick_timer.cc b/webrtc/modules/audio_coding/neteq/tick_timer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4a1b9b7b1fe20c41388a8b7e531340b0ce08cfac
--- /dev/null
+++ b/webrtc/modules/audio_coding/neteq/tick_timer.cc
@@ -0,0 +1,25 @@
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/modules/audio_coding/neteq/tick_timer.h"
+
+namespace webrtc {
+
+TickTimer::Stopwatch::Stopwatch(const TickTimer& ticktimer)
+    : ticktimer_(ticktimer), starttick_(ticktimer.ticks()) {}
+
+TickTimer::Countdown::Countdown(const TickTimer& ticktimer,
+                                uint64_t ticks_to_count)
+    : stopwatch_(ticktimer.GetNewStopwatch()),
+      ticks_to_count_(ticks_to_count) {}
+
+TickTimer::Countdown::~Countdown() = default;
+
+}  // namespace webrtc