Fix some compilation errors and warnings in Pub.

utils/pub/package.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('package');
 
 #import('io.dart');
 #import('pubspec.dart');
 #import('source.dart');
 #import('source_registry.dart');
@@ skipping 25 matching lines @@
   }
 
   /**
    * The path to the directory containing the package.
    */
   final String dir;
 
   /**
    * The name of the package.
    */
-  String get name() {
+  String get name {
     if (pubspec.name != null) return pubspec.name;
     if (dir != null) return basename(dir);
     return null;
   }
 
   /**
    * The package's version.
    */
   Version get version => pubspec.version;
 
@@ skipping 133 matching lines @@
 
   String toString() => "$name $constraint from $source ($description)";
 
   /**
    * Returns a [PackageId] generated from this [PackageRef] with the given
    * concrete version.
    */
   PackageId atVersion(Version version) =>
     new PackageId(source, version, description);
 }