Swap use of CriticalSectionWrapper with rtc::CriticalSection in voice_engine/

webrtc/voice_engine/level_indicator.h

Index: webrtc/voice_engine/level_indicator.h
diff --git a/webrtc/voice_engine/level_indicator.h b/webrtc/voice_engine/level_indicator.h
index c9b0b142e64482f39cbcee9ae5d31963dbaa671a..0f146ce36ce83990df5a448c7b93807fac43e086 100644
--- a/webrtc/voice_engine/level_indicator.h
+++ b/webrtc/voice_engine/level_indicator.h
@@ -11,13 +11,13 @@
 #ifndef WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H
 #define WEBRTC_VOICE_ENGINE_LEVEL_INDICATOR_H
 
+#include "webrtc/base/criticalsection.h"
 #include "webrtc/typedefs.h"
 #include "webrtc/voice_engine/voice_engine_defines.h"
 
 namespace webrtc {
 
 class AudioFrame;
-class CriticalSectionWrapper;
 namespace voe {
 
 class AudioLevel
@@ -40,7 +40,7 @@ public:
 private:
     enum { kUpdateFrequency = 10};
 
-    CriticalSectionWrapper& _critSect;
+    mutable rtc::CriticalSection _critSect;
 
     int16_t _absMax;
     int16_t _count;