Update pub to use new import syntax.

utils/tests/pub/version_solver_test.dart

Index: utils/tests/pub/version_solver_test.dart
diff --git a/utils/tests/pub/version_solver_test.dart b/utils/tests/pub/version_solver_test.dart
index af63e5e6b9e6c32c4b7429d762b4d1eb114a0595..d2033ca9b0a91a02b77770e9c4db4ade1766b0d3 100644
--- a/utils/tests/pub/version_solver_test.dart
+++ b/utils/tests/pub/version_solver_test.dart
@@ -2,21 +2,21 @@
 // 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_update_test');
-
-#import('dart:io');
-#import('dart:isolate');
-
-#import('../../pub/lock_file.dart');
-#import('../../pub/package.dart');
-#import('../../pub/pubspec.dart');
-#import('../../pub/root_source.dart');
-#import('../../pub/source.dart');
-#import('../../pub/source_registry.dart');
-#import('../../pub/utils.dart');
-#import('../../pub/version.dart');
-#import('../../pub/version_solver.dart');
-#import('../../../pkg/unittest/unittest.dart');
+library pub_update_test;
+
+import 'dart:io';
+import 'dart:isolate';
+
+import '../../pub/lock_file.dart';
+import '../../pub/package.dart';
+import '../../pub/pubspec.dart';
+import '../../pub/root_source.dart';
+import '../../pub/source.dart';
+import '../../pub/source_registry.dart';
+import '../../pub/utils.dart';
+import '../../pub/version.dart';
+import '../../pub/version_solver.dart';
+import '../../../pkg/unittest/unittest.dart';
 
 final noVersion = 'no version';
 final disjointConstraint = 'disjoint';