Update audio code to use size_t more correctly, webrtc/modules/ portion.

webrtc/modules/audio_conference_mixer/source/level_indicator.h

Index: webrtc/modules/audio_conference_mixer/source/level_indicator.h
diff --git a/webrtc/modules/audio_conference_mixer/source/level_indicator.h b/webrtc/modules/audio_conference_mixer/source/level_indicator.h
index b0e87ffa7181bc3a883bc1755b63dd9084e2f673..e54e9a9e0fa54d976821d8c82f2aa1dcd5662caf 100644
--- a/webrtc/modules/audio_conference_mixer/source/level_indicator.h
+++ b/webrtc/modules/audio_conference_mixer/source/level_indicator.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_LEVEL_INDICATOR_H_
 #define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_LEVEL_INDICATOR_H_
 
+#include <stddef.h>
+
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
@@ -24,7 +26,7 @@ public:
 
     // Updates the level.
     void ComputeLevel(const int16_t* speech,
-                      const uint16_t nrOfSamples);
+                      const size_t nrOfSamples);
 
     int32_t GetLevel();
 private: