remove more CriticalSectionWrappers.

webrtc/system_wrappers/source/trace_posix.h

Index: webrtc/system_wrappers/source/trace_posix.h
diff --git a/webrtc/system_wrappers/source/trace_posix.h b/webrtc/system_wrappers/source/trace_posix.h
index 25dfeec07954eea7c35473b32ab305764e5a5ead..9da71039c9a3de22933381f6fbf785551f2ec5c6 100644
--- a/webrtc/system_wrappers/source/trace_posix.h
+++ b/webrtc/system_wrappers/source/trace_posix.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_TRACE_POSIX_H_
 #define WEBRTC_SYSTEM_WRAPPERS_SOURCE_TRACE_POSIX_H_
 
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
+#include "webrtc/base/criticalsection.h"
 #include "webrtc/system_wrappers/source/trace_impl.h"
 
 namespace webrtc {
@@ -19,7 +19,7 @@ namespace webrtc {
 class TracePosix : public TraceImpl {
  public:
   TracePosix();
-  ~TracePosix() override;
+  ~TracePosix() override = default;
 
   // This method can be called on several different threads different from
   // the creating thread.
@@ -31,7 +31,7 @@ class TracePosix : public TraceImpl {
   volatile mutable uint32_t  prev_api_tick_count_;
   volatile mutable uint32_t  prev_tick_count_;
 
-  CriticalSectionWrapper& crit_sect_;
+  rtc::CriticalSection crit_sect_;
 };
 
 }  // namespace webrtc