Update pub to use new import syntax.

utils/tests/pub/version_solver_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_update_test');
+library pub_update_test;
 
-#import('dart:io');
-#import('dart:isolate');
+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');
+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';
 final sourceMismatch = 'source mismatch';
 final descriptionMismatch = 'description mismatch';
 final couldNotSolve = 'unsolved';
 
 Source source1;
 Source source2;
 Source versionlessSource;
@@ skipping 494 matching lines @@
   var match = new RegExp(r"(.*) from (.*)").firstMatch(name);
   if (match == null) return new Pair<String, Source>(name, source1);
   switch (match[2]) {
   case 'mock1': return new Pair<String, Source>(match[1], source1);
   case 'mock2': return new Pair<String, Source>(match[1], source2);
   case 'root': return new Pair<String, Source>(match[1], rootSource);
   case 'versionless':
     return new Pair<String, Source>(match[1], versionlessSource);
   }
 }