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 2533328968945e4c2c67a2694e95ae8d19c288ea..c50b7921538c7cc9869d9569f62953b98b80eaf9 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;
 }