Remove more CriticalSectionWrappers.

webrtc/modules/audio_conference_mixer/source/time_scheduler.h

Index: webrtc/modules/audio_conference_mixer/source/time_scheduler.h
diff --git a/webrtc/modules/audio_conference_mixer/source/time_scheduler.h b/webrtc/modules/audio_conference_mixer/source/time_scheduler.h
index d1897fa100112a02dff87d7bce501b7459111d5f..b155429b8b295ef4ceb7e155c0aaf3d81b5f64c0 100644
--- a/webrtc/modules/audio_conference_mixer/source/time_scheduler.h
+++ b/webrtc/modules/audio_conference_mixer/source/time_scheduler.h
@@ -11,17 +11,18 @@
 // The TimeScheduler class keeps track of periodic events. It is non-drifting
 // and keeps track of any missed periods so that it is possible to catch up.
 // (compare to a metronome)
+#include "webrtc/base/criticalsection.h"
 
 #ifndef WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_TIME_SCHEDULER_H_
 #define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_TIME_SCHEDULER_H_
 
 namespace webrtc {
 class CriticalSectionWrapper;
-class TimeScheduler
-{
+
+class TimeScheduler {
 public:
     TimeScheduler(const int64_t periodicityInMs);
-    ~TimeScheduler();
+    ~TimeScheduler() = default;
 
     // Signal that a periodic event has been triggered.
     int32_t UpdateScheduler();
@@ -31,7 +32,7 @@ public:
     int32_t TimeToNextUpdate(int64_t& updateTimeInMS) const;
 
 private:
-    CriticalSectionWrapper* _crit;
+    rtc::CriticalSection _crit;
 
     bool _isStarted;
     int64_t _lastPeriodMark; // In ns