Update pub to use new import syntax.

utils/tests/pub/test_pub.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.
 
 /**
  * Test infrastructure for testing pub. Unlike typical unit tests, most pub
  * tests are integration tests that stage some stuff on the file system, run
  * pub, and then validate the results. This library provides an API to build
  * tests like that.
  */
-#library('test_pub');
+library test_pub;
 
-#import('dart:io');
-#import('dart:isolate');
-#import('dart:json');
-#import('dart:math');
-#import('dart:uri');
+import 'dart:io';
+import 'dart:isolate';
+import 'dart:json';
+import 'dart:math';
+import 'dart:uri';
 
-#import('../../../pkg/unittest/unittest.dart');
-#import('../../lib/file_system.dart', prefix: 'fs');
-#import('../../pub/git_source.dart');
-#import('../../pub/hosted_source.dart');
-#import('../../pub/io.dart');
-#import('../../pub/sdk_source.dart');
-#import('../../pub/utils.dart');
-#import('../../pub/yaml/yaml.dart');
+import '../../../pkg/unittest/unittest.dart';
+import '../../lib/file_system.dart' as fs;
+import '../../pub/git_source.dart';
+import '../../pub/hosted_source.dart';
+import '../../pub/io.dart';
+import '../../pub/sdk_source.dart';
+import '../../pub/utils.dart';
+import '../../pub/yaml/yaml.dart';
 
 /**
  * Creates a new [FileDescriptor] with [name] and [contents].
  */
 FileDescriptor file(Pattern name, String contents) =>
     new FileDescriptor(name, contents);
 
 /**
  * Creates a new [DirectoryDescriptor] with [name] and [contents].
  */
@@ skipping 1165 matching lines @@
 }
 
 /**
  * Schedules a callback to be called after Pub is run with [runPub], even if it
  * fails.
  */
 void _scheduleCleanup(_ScheduledEvent event) {
   if (_scheduledCleanup == null) _scheduledCleanup = [];
   _scheduledCleanup.add(event);
 }