Revert "GetDefaultLocalAddress should return false when the address is invalid"

webrtc/p2p/base/stunport.cc

Index: webrtc/p2p/base/stunport.cc
diff --git a/webrtc/p2p/base/stunport.cc b/webrtc/p2p/base/stunport.cc
index 0ae3f60a8a9411c71b756a6ec47bf85dcb05cad7..13ecca4a3a1cb90b2640e45ebee708d47cc2bf37 100644
--- a/webrtc/p2p/base/stunport.cc
+++ b/webrtc/p2p/base/stunport.cc
@@ -416,12 +416,10 @@ bool UDPPort::MaybeSetDefaultLocalAddress(rtc::SocketAddress* addr) const {
   bool result =
       Network()->default_local_address_provider()->GetDefaultLocalAddress(
           addr->family(), &default_address);
-  if (!result) {
+  if (!result || default_address.IsNil()) {
     return false;
   }
 
-  RTC_DCHECK(!default_address.IsNil())
-
   addr->SetIP(default_address);
   return true;
 }