Replaced CriticalSectionWrapper with rtc::CriticalSection in rtp_rtcp module

webrtc/modules/rtp_rtcp/source/dtmf_queue.cc

Index: webrtc/modules/rtp_rtcp/source/dtmf_queue.cc
diff --git a/webrtc/modules/rtp_rtcp/source/dtmf_queue.cc b/webrtc/modules/rtp_rtcp/source/dtmf_queue.cc
index ab21b8704a53785c8e7560fb7796b2aa400de940..81e8b5926e2f6af288fa8bc6df548fd915424544 100644
--- a/webrtc/modules/rtp_rtcp/source/dtmf_queue.cc
+++ b/webrtc/modules/rtp_rtcp/source/dtmf_queue.cc
@@ -13,20 +13,16 @@
 #include <string.h>
 
 namespace webrtc {
-DTMFqueue::DTMFqueue()
-    : dtmf_critsect_(CriticalSectionWrapper::CreateCriticalSection()),
-      next_empty_index_(0) {
+DTMFqueue::DTMFqueue() : next_empty_index_(0) {
   memset(dtmf_key_, 0, sizeof(dtmf_key_));
   memset(dtmf_length, 0, sizeof(dtmf_length));
   memset(dtmf_level_, 0, sizeof(dtmf_level_));
 }
 
-DTMFqueue::~DTMFqueue() {
-  delete dtmf_critsect_;
-}
+DTMFqueue::~DTMFqueue() {}
 
 int32_t DTMFqueue::AddDTMF(uint8_t key, uint16_t len, uint8_t level) {
-  CriticalSectionScoped lock(dtmf_critsect_);
+  rtc::CritScope lock(&dtmf_critsect_);
 
   if (next_empty_index_ >= DTMF_OUTBAND_MAX) {
     return -1;
@@ -40,7 +36,7 @@ int32_t DTMFqueue::AddDTMF(uint8_t key, uint16_t len, uint8_t level) {
 }
 
 int8_t DTMFqueue::NextDTMF(uint8_t* dtmf_key, uint16_t* len, uint8_t* level) {
-  CriticalSectionScoped lock(dtmf_critsect_);
+  rtc::CritScope lock(&dtmf_critsect_);
   if (next_empty_index_ == 0)
     return -1;
 
@@ -60,12 +56,12 @@ int8_t DTMFqueue::NextDTMF(uint8_t* dtmf_key, uint16_t* len, uint8_t* level) {
 }
 
 bool DTMFqueue::PendingDTMF() {
-  CriticalSectionScoped lock(dtmf_critsect_);
+  rtc::CritScope lock(&dtmf_critsect_);
   return next_empty_index_ > 0;
 }
 
 void DTMFqueue::ResetDTMF() {
-  CriticalSectionScoped lock(dtmf_critsect_);
+  rtc::CritScope lock(&dtmf_critsect_);
   next_empty_index_ = 0;
 }
 }  // namespace webrtc