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

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index 54fae2b71107398b6938e1b4c2797c00044ce4c8..bcb2cf6bd98b1f1e8741d0a00360b2445da01636 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -175,6 +175,11 @@ class PeerConnectionInterface : public rtc::RefCountInterface {
     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;