Use appPubspec() in more places.

sdk/lib/_internal/pub/test/pub_install_and_update_test.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.
 
 library pub_tests;
 
 import 'dart:io';
 
 import 'package:scheduled_test/scheduled_test.dart';
 
@@ skipping 57 matching lines @@
     });
 
     integration('does not add a package if it does not have a "lib" '
         'directory', () {
       // Using a path source, but this should be true of all sources.
       d.dir('foo', [
         d.libPubspec('foo', '0.0.0-not.used')
       ]).create();
 
       d.dir(appPath, [
-        d.pubspec({"name": "myapp", "dependencies": {"foo": {"path": "../foo"}}})
+        d.appPubspec({"foo": {"path": "../foo"}})
       ]).create();
 
       pubCommand(command);
 
       d.packagesDir({"foo": null}).validate();
     });
 
     integration('reports a solver failure', () {
       // myapp depends on foo and bar which both depend on baz with mismatched
       // descriptions.
@@ skipping 10 matching lines @@
         ]),
         d.dir('baz1', [
           d.libPubspec('baz', '0.0.0')
         ]),
         d.dir('baz2', [
           d.libPubspec('baz', '0.0.0')
         ])
       ]).create();
 
       d.dir(appPath, [
-        d.pubspec({"name": "myapp", "dependencies": {
+        d.appPubspec({
           "foo": {"path": "../deps/foo"},
           "bar": {"path": "../deps/bar"}
-        }})
+        })
       ]).create();
 
       pubCommand(command,
           error: new RegExp("^Incompatible dependencies on 'baz':\n"));
     });
   });
 }