pub site: update dependencies and fix analyzer

app/test/backend_test_utils.dart

 // Copyright (c) 2015, 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_dartlang_org.backend_test_utils;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:gcloud/db.dart' as gdb;
@@ skipping 176 matching lines @@
   Future upload(String package, String version, Stream<List<int>> tarball) {
     if (uploadFun == null) throw 'no uploadFun';
     return uploadFun(package, version, tarball);
   }
 
   Future uploadViaTempObject(
       String guid, String package, String version) async {
     if (uploadViaTempObjectFun == null) throw 'no uploadViaTempObjectFun';
     return uploadViaTempObjectFun(guid, package, version);
   }
+
+  Future remove(String package, String version) =>
+      throw new UnimplementedError();
 }
 
 class UploadSignerServiceMock implements UploadSignerService {
   final Function buildUploadFun;
 
   UploadSignerServiceMock(this.buildUploadFun);
 
   get serviceAccountEmail => throw 'no serviceAccountEmail support';
 
   AsyncUploadInfo buildUpload(
@@ skipping 77 matching lines @@
         ['README.md', 'CHANGELOG.md', 'pubspec.yaml', 'lib/test_library.dart'];
     var args = ['cz']..addAll(files);
     Process p = await Process.start('tar', args, workingDirectory: '$tmp');
     p.stderr.drain();
     var bytes = await p.stdout.fold([], (b, d) => b..addAll(d));
     var exitCode = await p.exitCode;
     if (exitCode != 0) throw 'Failed to make tarball of test package.';
     return func(bytes);
   });
 }