Remove abstract from class members in dart libraries

runtime/bin/socket_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class ServerSocket {
   /* patch */ factory ServerSocket(String bindAddress, int port, int backlog) {
     return new _ServerSocket(bindAddress, port, backlog);
   }
 }
 
@@ skipping 221 matching lines @@
       }
     } else {
       doReportError(new SocketIOException(message));
     }
   }
 
   int get hashCode => _hashCode;
 
   bool _propagateError(Exception e) => false;
 
-  abstract bool _isListenSocket();
-  abstract bool _isPipe();
+  bool _isListenSocket();
+  bool _isPipe();
 
   // Is this socket closed.
   bool _closed;
 
   // Dedicated ReceivePort for socket events.
   ReceivePort _handler;
 
   // Poll event to handler map.
   List _handlerMap;
 
@@ skipping 344 matching lines @@
   bool _seenFirstOutEvent = false;
   bool _pipe = false;
   Function _clientConnectHandler;
   Function _clientWriteHandler;
   _SocketInputStream _inputStream;
   _SocketOutputStream _outputStream;
   String _remoteHost;
   int _remotePort;
   static SendPort _socketService;
 }