Replace ASSERT by RTC_DCHECK in all non-test code.

webrtc/p2p/base/asyncstuntcpsocket.cc

Index: webrtc/p2p/base/asyncstuntcpsocket.cc
diff --git a/webrtc/p2p/base/asyncstuntcpsocket.cc b/webrtc/p2p/base/asyncstuntcpsocket.cc
index 444f06146a461c5146ba2918507c3e39f7ccec8d..5f693cabcb7b5b0631aecbb51e2f19025a082e18 100644
--- a/webrtc/p2p/base/asyncstuntcpsocket.cc
+++ b/webrtc/p2p/base/asyncstuntcpsocket.cc
@@ -13,6 +13,7 @@
 #include <string.h>
 
 #include "webrtc/p2p/base/stun.h"
+#include "webrtc/base/checks.h"
 #include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 
@@ -68,7 +69,7 @@ int AsyncStunTCPSocket::Send(const void *pv, size_t cb,
 
   AppendToOutBuffer(pv, cb);
 
-  ASSERT(pad_bytes < 4);
+  RTC_DCHECK(pad_bytes < 4);
   char padding[4] = {0};
   AppendToOutBuffer(padding, pad_bytes);