Fix static type errors in a number of tests

tests/standalone/io/web_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 "package:expect/expect.dart";
@@ skipping 175 matching lines @@
     });
   }
 
 
   void testImmediateCloseServer() {
     createServer().then((server) {
       server.listen((request) {
         WebSocketTransformer.upgrade(request)
             .then((webSocket) {
               webSocket.close();
-              webSocket.listen((_) { Expect.fail(); }, onDone: server.close);
+              webSocket.listen(
+                  (_) { Expect.fail("Unexpected message"); },
+                  onDone: server.close);
             });
       });
 
       createClient(server.port).then((webSocket) {
-          webSocket.listen((_) { Expect.fail(); }, onDone: webSocket.close);
+          webSocket.listen(
+              (_) { Expect.fail("Unexpected message"); },
+              onDone: webSocket.close);
         });
     });
   }
 
 
   void testImmediateCloseClient() {
     createServer().then((server) {
       server.listen((request) {
         WebSocketTransformer.upgrade(request)
             .then((webSocket) {
-              webSocket.listen((_) { Expect.fail(); }, onDone: () {
+              webSocket.listen(
+                  (_) { Expect.fail("Unexpected message"); },
+                  onDone: () {
                 server.close();
                 webSocket.close();
               });
             });
       });
 
       createClient(server.port).then((webSocket) {
           webSocket.close();
-          webSocket.listen((_) { Expect.fail(); }, onDone: webSocket.close);
+          webSocket.listen(
+              (_) { Expect.fail("Unexpected message"); },
+              onDone: webSocket.close);
         });
     });
   }
 
 
   void testNoUpgrade() {
     createServer().then((server) {
       // Create a server which always responds with NOT_FOUND.
       server.listen((request) {
         request.response.statusCode = HttpStatus.NOT_FOUND;
@@ skipping 171 matching lines @@
   SecureSocket.initialize(database: testPkcertDatabase.toNativePath(),
                           password: "dartdart");
 }
 
 
 main() {
   new SecurityConfiguration(secure: false).runTests();
   initializeSSL();
   new SecurityConfiguration(secure: true).runTests();
 }