First step of passive aggressive nomination.

webrtc/p2p/base/port.cc

Index: webrtc/p2p/base/port.cc
diff --git a/webrtc/p2p/base/port.cc b/webrtc/p2p/base/port.cc
index 4023b322e732ef31e6827bd3fc95715351fc2f22..5be0e8dfa1bce1c9c9a007a98fab0038b66ca941 100644
--- a/webrtc/p2p/base/port.cc
+++ b/webrtc/p2p/base/port.cc
@@ -887,6 +887,7 @@ Connection::Connection(Port* port,
       connected_(true),
       pruned_(false),
       use_candidate_attr_(false),
+      received_use_candidate_(false),
       remote_ice_mode_(ICEMODE_FULL),
       requests_(port->thread()),
       rtt_(DEFAULT_RTT),
@@ -1056,8 +1057,10 @@ void Connection::OnReadPacket(
               (port_->GetIceRole() == ICEROLE_CONTROLLED)) {
             const StunByteStringAttribute* use_candidate_attr =
                 msg->GetByteString(STUN_ATTR_USE_CANDIDATE);
-            if (use_candidate_attr)
+            if (use_candidate_attr) {
+              set_received_use_candidate(true);
               SignalUseCandidate(this);
+            }
           }
         } else {
           // The packet had the right local username, but the remote username