Bug 4517: Enable connectivity for demo page when no STUN/TURN specifiefd.

webrtc/base/ipaddress.cc

Index: webrtc/base/ipaddress.cc
diff --git a/webrtc/base/ipaddress.cc b/webrtc/base/ipaddress.cc
index ae3b38da8b1a35e421882e846c592ad9ace968f2..338042904f2fb4f7b41008608b1251dd6b3130d9 100644
--- a/webrtc/base/ipaddress.cc
+++ b/webrtc/base/ipaddress.cc
@@ -494,4 +494,13 @@ int IPAddressPrecedence(const IPAddress& ip) {
   return 0;
 }
 
-}  // Namespace talk base
+IPAddress GetLoopbackIP(int family) {
+  if (family == AF_INET) {
+    return rtc::IPAddress(INADDR_LOOPBACK);
+  }
+  if (family == AF_INET6) {
+    return rtc::IPAddress(in6addr_loopback);
+  }
+  return rtc::IPAddress();
+}
+}  // Namespace rtc