Implement the "needs-ice-restart" logic for SetConfiguration.

webrtc/api/peerconnectioninterface.h

 /*
  *  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 157 matching lines @@
     kIceConnectionClosed,
     kIceConnectionMax,
   };
 
   struct IceServer {
     // TODO(jbauch): Remove uri when all code using it has switched to urls.
     std::string uri;
     std::vector<std::string> urls;
     std::string username;
     std::string password;
+    bool operator==(const IceServer& o) const {
+      return uri == o.uri && urls == o.urls && username == o.username &&
+             password == o.password;
+    }
+    bool operator!=(const IceServer& o) const { return !(*this == o); }
   };
   typedef std::vector<IceServer> IceServers;
 
   enum IceTransportsType {
     // TODO(pthatcher): Rename these kTransporTypeXXX, but update
     // Chromium at the same time.
     kNone,
     kRelay,
     kNoHost,
     kAll
@@ skipping 581 matching lines @@
     cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory) {
   return CreatePeerConnectionFactory(
       worker_and_network_thread, worker_and_network_thread, signaling_thread,
       default_adm, encoder_factory, decoder_factory);
 }
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_PEERCONNECTIONINTERFACE_H_