Use appPubspec() in more places.

sdk/lib/_internal/pub/test/install/path/relative_symlink_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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 d.file.
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   // Pub uses NTFS junction points to create links in the packages directory.
   // These (unlike the symlinks that are supported in Vista and later) do not
   // support relative paths. So this test, by design, will not pass on Windows.
   // So just skip it.
   if (Platform.operatingSystem == "windows") return;
 
   initConfig();
   integration("generates a symlink with a relative path if the dependency "
               "path was relative", () {
     d.dir("foo", [
       d.libDir("foo"),
       d.libPubspec("foo", "0.0.1")
     ]).create();
 
     d.dir(appPath, [
-      d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {"path": "../foo"}
-        }
+      d.appPubspec({
+        "foo": {"path": "../foo"}
       })
     ]).create();
 
     pubInstall();
 
     d.dir("moved").create();
 
     // Move the app and package. Since they are still next to each other, it
     // should still be found.
     scheduleRename("foo", path.join("moved", "foo"));
     scheduleRename(appPath, path.join("moved", appPath));
 
     d.dir("moved", [
       d.dir(packagesPath, [
         d.dir("foo", [
           d.file("foo.dart", 'main() => "foo";')
         ])
       ])
     ]).validate();
   });
 }