Swap use of CriticalSectionWrapper with rtc::CriticalSection in voice_engine/
Also remove mischievous tab character!
This is a part of getting rid of CriticalSectionWrapper and makes the code slightly simpler.

BUG=

Review URL: https://codereview.webrtc.org/1607353002

Cr-Commit-Position: refs/heads/master@{#11346}
diff --git a/webrtc/voice_engine/statistics.h b/webrtc/voice_engine/statistics.h
index 3dab916..e853e68 100644
--- a/webrtc/voice_engine/statistics.h
+++ b/webrtc/voice_engine/statistics.h
@@ -11,14 +11,13 @@
 #ifndef WEBRTC_VOICE_ENGINE_STATISTICS_H
 #define WEBRTC_VOICE_ENGINE_STATISTICS_H
 
+#include "webrtc/base/criticalsection.h"
 #include "webrtc/common_types.h"
 #include "webrtc/typedefs.h"
 #include "webrtc/voice_engine/include/voe_errors.h"
 #include "webrtc/voice_engine/voice_engine_defines.h"
 
 namespace webrtc {
-class CriticalSectionWrapper;
-
 namespace voe {
 
 class Statistics
@@ -40,7 +39,7 @@
     int32_t LastError() const;
 
  private:
-    CriticalSectionWrapper* _critPtr;
+    mutable rtc::CriticalSection lock_;
     const uint32_t _instanceId;
     mutable int32_t _lastError;
     bool _isInitialized;