Update pub to new getter syntax.

utils/pub/source.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('source');
 
 #import('io.dart');
 #import('package.dart');
 #import('pubspec.dart');
 #import('system_cache.dart');
 #import('version.dart');
 
 /**
  * A source from which to install packages.
  *
  * Each source has many packages that it looks up using [PackageId]s. The source
  * is responsible for installing these packages to the package cache.
  */
 class Source {
   /**
    * The name of the source. Should be lower-case, suitable for use in a
    * filename, and unique accross all sources.
    */
-  abstract String get name();
+  abstract String get name;
 
   /**
    * Whether this source's packages should be cached in Pub's global cache
    * directory.
    *
    * A source should be cached if it requires network access to retrieve
    * packages. It doesn't need to be cached if all packages are available
    * locally.
    */
-  abstract bool get shouldCache();
+  abstract bool get shouldCache;
 
   /**
    * The system cache with which this source is registered.
    */
-  SystemCache get systemCache() {
+  SystemCache get systemCache {
     assert(_systemCache != null);
     return _systemCache;
   }
 
   /**
    * The system cache variable. Set by [_bind].
    */
   SystemCache _systemCache;
 
   /**
    * The root directory of this source's cache within the system cache.
    *
    * This shouldn't be overridden by subclasses.
    */
-  String get systemCacheRoot() => join(systemCache.rootDir, name);
+  String get systemCacheRoot => join(systemCache.rootDir, name);
 
   /**
    * Records the system cache to which this source belongs.
    *
    * This should only be called once for each source, by [SystemCache.register].
    * It should not be overridden by base classes.
    */
   void bind(SystemCache systemCache) {
     assert(_systemCache == null);
     this._systemCache = systemCache;
@@ skipping 124 matching lines @@
    *
    * The returned [PackageId] may have a description field that's invalid
    * according to [validateDescription], although it must still be serializable
    * to JSON and YAML. It must also be equal to [id] according to
    * [descriptionsEqual].
    *
    * By default, this just returns [id].
    */
   Future<PackageId> resolveId(PackageId id) => new Future.immediate(id);
 }