Split up some slow pub tests and mark some scheduled_test tests as slow.

utils/tests/pub/lish/upload_form_is_missing_url_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.
+
+import 'dart:json' as json;
+
+import 'package:scheduled_test/scheduled_test.dart';
+import 'package:scheduled_test/scheduled_server.dart';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import 'utils.dart';
+
+main() {
+  initConfig();
+  setUp(d.validPackage.create);
+
+  integration('upload form is missing url', () {
+    var server = new ScheduledServer();
+    d.credentialsFile(server, 'access token').create();
+    var pub = startPublish(server);
+
+    confirmPublish(pub);
+
+    var body = {
+      'fields': {
+        'field1': 'value1',
+        'field2': 'value2'
+      }
+    };
+
+    handleUploadForm(server, body);
+    expect(pub.nextErrLine(), completion(equals('Invalid server response:')));
+    expect(pub.nextErrLine(), completion(equals(json.stringify(body))));
+    pub.shouldExit(1);
+  });
+}