Replace ASSERT by RTC_DCHECK in all non-test code.

webrtc/base/natserver.cc

Index: webrtc/base/natserver.cc
diff --git a/webrtc/base/natserver.cc b/webrtc/base/natserver.cc
index 222d2709e2745b0bfc0c4c8994f5124b098bf971..e00bf9f7e53404d882e0a9ebc17410c5cad8475f 100644
--- a/webrtc/base/natserver.cc
+++ b/webrtc/base/natserver.cc
@@ -10,6 +10,7 @@
 
 #include <memory>
 
+#include "webrtc/base/checks.h"
 #include "webrtc/base/natsocketfactory.h"
 #include "webrtc/base/natserver.h"
 #include "webrtc/base/logging.h"
@@ -87,7 +88,7 @@ class NATProxyServerSocket : public AsyncProxyServerSocket {
     }
 
     int family = data[1];
-    ASSERT(family == AF_INET || family == AF_INET6);
+    RTC_DCHECK(family == AF_INET || family == AF_INET6);
     if ((family == AF_INET && *len < kNATEncodedIPv4AddressSize) ||
         (family == AF_INET6 && *len < kNATEncodedIPv6AddressSize)) {
       return;
@@ -169,7 +170,7 @@ void NATServer::OnInternalUDPPacket(
     Translate(route);
     iter = int_map_->find(route);
   }
-  ASSERT(iter != int_map_->end());
+  RTC_DCHECK(iter != int_map_->end());
 
   // Allow the destination to send packets back to the source.
   iter->second->WhitelistInsert(dest_addr);
@@ -186,7 +187,7 @@ void NATServer::OnExternalUDPPacket(
 
   // Find the translation for this addresses.
   ExternalMap::iterator iter = ext_map_->find(local_addr);
-  ASSERT(iter != ext_map_->end());
+  RTC_DCHECK(iter != ext_map_->end());
 
   // Allow the NAT to reject this packet.
   if (ShouldFilterOut(iter->second, remote_addr)) {