Make event-handlers edge-triggered and move socket-state to Dart.

tests/standalone/io/socket_test.dart

 // Copyright (c) 2013, 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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "dart:async";
@@ skipping 44 matching lines @@
               Expect.fail("Multiple listens on same port");
             })
             .catchError((error) {
               Expect.isTrue(error is SocketException);
               s.close();
               asyncEnd();
             });
       });
 }
 
-void testConnectNoDestroy() {
-  asyncStart();
-  ServerSocket.bind(InternetAddress.LOOPBACK_IP_V4, 0).then((server) {
-    server.listen((_) { });
-    Socket.connect("127.0.0.1", server.port).then((_) {
-      server.close();
-      asyncEnd();
-    });
-  });
-}
-
 void testConnectImmediateDestroy() {
   asyncStart();
   ServerSocket.bind(InternetAddress.LOOPBACK_IP_V4, 0).then((server) {
     server.listen((_) { });
     Socket.connect("127.0.0.1", server.port).then((socket) {
       socket.destroy();
       server.close();
       asyncEnd();
     });
   });
@@ skipping 117 matching lines @@
               subscription.cancel();
               socket.close();
               server.close();
               asyncEnd();
             },
             onDone: () { Expect.fail("Unexpected pipe completion"); });
     });
   });
 }
 
-void testCloseWriteNoListen() {
-  asyncStart();
-  ServerSocket.bind(InternetAddress.LOOPBACK_IP_V4, 0).then((server) {
-    server.listen(
-        (client) {
-          client.close();
-        });
-    Socket.connect("127.0.0.1", server.port).then((socket) {
-      socket.close();
-      server.close();
-      asyncEnd();
-    });
-  });
-}
-
 main() {
   testArguments();
   testSimpleBind();
   testInvalidBind();
-  testConnectNoDestroy();
   testConnectImmediateDestroy();
   testConnectConsumerClose();
   testConnectConsumerWriteClose();
   testConnectStreamClose();
   testConnectStreamDataClose(true);
   testConnectStreamDataClose(false);
   testConnectStreamDataCloseCancel(true);
   testConnectStreamDataCloseCancel(false);
-  testCloseWriteNoListen();
 }