Fix intermittent connection failure in CRD.

remoting/protocol/libjingle_transport_factory.cc

Index: remoting/protocol/libjingle_transport_factory.cc
diff --git a/remoting/protocol/libjingle_transport_factory.cc b/remoting/protocol/libjingle_transport_factory.cc
index fa497cb1d915f7634a55d94f168ff1efb61efe02..151d329f85827c3aeb27ba02df9c58344b0f1790 100644
--- a/remoting/protocol/libjingle_transport_factory.cc
+++ b/remoting/protocol/libjingle_transport_factory.cc
@@ -150,6 +150,8 @@ void LibjingleTransport::OnCanStart() {
     DoStart();
 
   while (!pending_candidates_.empty()) {
+    channel_->SetRemoteIceCredentials(pending_candidates_.front().username(),
+                                      pending_candidates_.front().password());

[jiayl, 2015/04/15 20:13:00]

Do all candidates share the same username/password? Add a check for that, and
call SetRemoteIceCredentials just once?

[Sergey Ulanov, 2015/04/15 20:49:34]

Credentials may change when the remote peer restarts ICE. We could call
SetRemoteIceCredentials() only when they change, but it looks like
SetRemoteIceCredentials() verifies it anyway, so I'm not sure we would get
anything from duplicating the same check here.

     channel_->OnCandidate(pending_candidates_.front());
     pending_candidates_.pop_front();
   }
@@ -228,6 +230,8 @@ void LibjingleTransport::AddRemoteCandidate(
     return;
 
   if (channel_) {
+    channel_->SetRemoteIceCredentials(candidate.username(),
+                                      candidate.password());
     channel_->OnCandidate(candidate);
   } else {
     pending_candidates_.push_back(candidate);