Minor cleanups to take advantage of lazy initialization

pkg/intl/lib/src/lazy_locale_data.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.
 
 /**
  * This defines a class for loading locale data incrementally from
  * an external source as JSON. The external sources expected are either
  * local files or via HTTP request.
  */
 
@@ skipping 24 matching lines @@
   /**
    * Given a piece of remote data, apply [_creationFunction] to it to
    * convert it into the right form. Typically this means converting it
    * from a Map into an object form.
    */
   Function _creationFunction;
 
   /**
    * The set of available locales.
    */
-  Set _availableLocaleSet;
+  Set availableLocaleSet;
 
   /**
    * The constructor. The [uriString] specifies where the data comes
    * from. The [_creationFunction] creates the appropriate data type
    * from the remote data (which typically comes in as a Map). The
    * [keys] lists the set of remotely available locale names so we know which
    * things can be fetched without having to check remotely.
    */
   LazyLocaleData(this._reader, this._creationFunction, List keys) {
     map = new Map();
     availableLocales = keys;
-  }
-
-  /** The set of available locales. */
-  get availableLocaleSet {
-    if (_availableLocaleSet == null) {
-      _availableLocaleSet = new Set.from(availableLocales);
-    }
-    return _availableLocaleSet;
+    availableLocaleSet = new Set.from(availableLocales);
   }
 
   /**
    *  Tests if we have data for the locale available. Note that this returns
    * true even if the data is known to be available remotely but not yet loaded.
    */
   bool containsKey(String locale) => availableLocaleSet.contains(locale);
 
   /** Returns the list of keys/locale names. */
   List getKeys() => availableLocales;
@@ skipping 36 matching lines @@
   }
 
   /**
    * Given a Future [input] whose value is expected to be a string in JSON form,
    * return another future that parses the JSON into a usable format.
    */
   Future jsonData(Future input) {
     return input.transform( (response) => JSON.parse(response));
   }
 }