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

talk/app/webrtc/webrtcsession.cc

Index: talk/app/webrtc/webrtcsession.cc
diff --git a/talk/app/webrtc/webrtcsession.cc b/talk/app/webrtc/webrtcsession.cc
index c37eadb8a82ceb0cc48f401ab0256957ed9f21f1..e3f72e073fcd045b688e5e01dde14e22a9b126e8 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -678,6 +678,13 @@ bool WebRtcSession::Initialize(
   }
   port_allocator()->set_candidate_filter(
       ConvertIceTransportTypeToCandidateFilter(rtc_configuration.type));
+
+  if (rtc_configuration.enable_localhost_ice_candidate) {
+    port_allocator()->set_flags(
+        port_allocator()->flags() |
+        cricket::PORTALLOCATOR_ENABLE_LOCALHOST_CANDIDATE);
+  }
+
   return true;
 }