remove more CriticalSectionWrappers.

webrtc/system_wrappers/source/trace_posix.cc

Index: webrtc/system_wrappers/source/trace_posix.cc
diff --git a/webrtc/system_wrappers/source/trace_posix.cc b/webrtc/system_wrappers/source/trace_posix.cc
index cb702d8cea19457347e568a185eb7c4a85c00a8b..f181ad2177d907e3a60b4669d804430901932b18 100644
--- a/webrtc/system_wrappers/source/trace_posix.cc
+++ b/webrtc/system_wrappers/source/trace_posix.cc
@@ -19,17 +19,12 @@
 
 namespace webrtc {
 
-TracePosix::TracePosix()
-    : crit_sect_(*CriticalSectionWrapper::CreateCriticalSection()) {
+TracePosix::TracePosix() {
   struct timeval system_time_high_res;
   gettimeofday(&system_time_high_res, 0);
   prev_api_tick_count_ = prev_tick_count_ = system_time_high_res.tv_sec;
 }
 
-TracePosix::~TracePosix() {
-  delete &crit_sect_;
-}
-
 int32_t TracePosix::AddTime(char* trace_message, const TraceLevel level) const {
   struct timeval system_time_high_res;
   if (gettimeofday(&system_time_high_res, 0) == -1) {
@@ -42,7 +37,7 @@ int32_t TracePosix::AddTime(char* trace_message, const TraceLevel level) const {
   const uint32_t ms_time = system_time_high_res.tv_usec / 1000;
   uint32_t prev_tickCount = 0;
   {
-    CriticalSectionScoped lock(&crit_sect_);
+    rtc::CritScope lock(&crit_sect_);
     if (level == kTraceApiCall) {
       prev_tickCount = prev_tick_count_;
       prev_tick_count_ = ms_time;