Update pub to new getter 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');
 
 #import('dart:io');
 #import('dart:isolate');
 
 #import('../../pub/lock_file.dart');
@@ skipping 360 matching lines @@
  * a source for them.
  *
  * In order to support testing packages that have the same name but different
  * descriptions, a package's name is calculated by taking the description string
  * and stripping off any trailing hyphen followed by non-hyphen characters.
  */
 class MockSource extends Source {
   final Map<String, Map<Version, Package>> _packages;
 
   final String name;
-  bool get shouldCache() => true;
+  bool get shouldCache => true;
 
   MockSource(this.name)
       : _packages = <String, Map<Version, Package>>{};
 
   Future<List<Version>> getVersions(String name) {
     return fakeAsync(() => _packages[name].getKeys());
   }
 
   Future<Pubspec> describe(PackageId id) {
     return fakeAsync(() {
@@ skipping 66 matching lines @@
 Pair<String, Source> parseSource(String name) {
   var match = new RegExp(@"(.*) 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 'versionless':
     return new Pair<String, Source>(match[1], versionlessSource);
   }
 }