NetEq: Introduce TickTimer in DelayPeakDetector

Specifically, this change replaces peak_period_counter_ms_ with
peak_period_stopwatch_ which obtains a Stopwatch object from
TickTimer. Necessary plumbing to get the TickTimer through to the
DelayPeakDetector is also included.

BUG=webrtc:5608
NOTRY=True

Review-Url: https://codereview.webrtc.org/1921163003
Cr-Commit-Position: refs/heads/master@{#12542}
diff --git a/webrtc/modules/audio_coding/neteq/neteq_impl.cc b/webrtc/modules/audio_coding/neteq/neteq_impl.cc
index 01325e3..7bdb23c 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_impl.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq_impl.cc
@@ -58,7 +58,7 @@
     : tick_timer(new TickTimer),
       buffer_level_filter(new BufferLevelFilter),
       decoder_database(new DecoderDatabase),
-      delay_peak_detector(new DelayPeakDetector),
+      delay_peak_detector(new DelayPeakDetector(tick_timer.get())),
       delay_manager(new DelayManager(config.max_packets_in_buffer,
                                      delay_peak_detector.get())),
       dtmf_buffer(new DtmfBuffer(config.sample_rate_hz)),