Remove deprecated IsUnresolved() method from SocketAddress API.

webrtc/examples/peerconnection/client/peer_connection_client.cc

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 96 matching lines @@
     return;
   }
 
   if (port <= 0)
     port = kDefaultServerPort;
 
   server_address_.SetIP(server);
   server_address_.SetPort(port);
   client_name_ = client_name;
 
-  if (server_address_.IsUnresolved()) {
+  if (server_address_.IsUnresolvedIP()) {
     state_ = RESOLVING;
     resolver_ = new rtc::AsyncResolver();
     resolver_->SignalDone.connect(this, &PeerConnectionClient::OnResolveResult);
     resolver_->Start(server_address_);
   } else {
     DoConnect();
   }
 }
 
 void PeerConnectionClient::OnResolveResult(
@@ skipping 377 matching lines @@
       Close();
       callback_->OnDisconnected();
     }
   }
 }
 
 void PeerConnectionClient::OnMessage(rtc::Message* msg) {
   // ignore msg; there is currently only one supported message ("retry")
   DoConnect();
 }