Remove the Dromaeo and TodoMVC samples.

samples/third_party/todomvc_performance/web/lib-elements/polymer_localstorage.dart

-// Copyright 2013 The Polymer Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-library todomvc.web.lib_elements.polymer_localstorage;
-
-import 'dart:convert' show JSON;
-import 'dart:html';
-import 'package:polymer/polymer.dart';
-
-// TODO(jmesserly): replace with interop to <polymer-localstorage>.
-@CustomTag('polymer-localstorage')
-class PolymerLocalStorage extends PolymerElement {
-  @published String name;
-  @published var value;
-  @published bool useRaw = false;
-
-  factory PolymerLocalStorage() => new Element.tag('polymer-localstorage');
-  PolymerLocalStorage.created() : super.created();
-
-  void ready() {
-    load();
-  }
-
-  void valueChanged() {
-    save();
-  }
-
-  void load() {
-    var s = window.localStorage[name];
-    if (s != null && !useRaw) {
-      value = JSON.decode(s);
-    } else {
-      value = s;
-    }
-  }
-
-  void save() {
-    window.localStorage[name] = useRaw ? value : JSON.encode(value);
-  }
-}