Remove type argument from SecureServerSocket

sdk/lib/io/secure_server_socket.dart

Index: sdk/lib/io/secure_server_socket.dart
diff --git a/sdk/lib/io/secure_server_socket.dart b/sdk/lib/io/secure_server_socket.dart
index eca89d32f3e16953e57b9025e62450603cb06347..53447fc583adbe24e5f53f8dee61dbc889c0d8b7 100644
--- a/sdk/lib/io/secure_server_socket.dart
+++ b/sdk/lib/io/secure_server_socket.dart
@@ -10,7 +10,7 @@ part of dart.io;
  *
  * See [SecureSocket] for more info.
  */
-class SecureServerSocket extends Stream<SecureSocket> implements ServerSocket {
+class SecureServerSocket extends Stream<SecureSocket> {
   final RawSecureServerSocket _socket;
 
   SecureServerSocket._(RawSecureServerSocket this._socket);
@@ -95,6 +95,11 @@ class SecureServerSocket extends Stream<SecureSocket> implements ServerSocket {
   int get port => _socket.port;
 
   /**
+   * Returns the address used by this socket.
+   */
+  InternetAddress get address => _socket.address;
+
+  /**
    * Closes the socket. The returned future completes when the socket
    * is fully closed and is no longer bound.
    */