Remove the Dromaeo and TodoMVC samples.

samples/third_party/todomvc_performance/web/elements/td_model.dart

-library todomvc.web.elements.td_model;
-
-import 'dart:html';
-import 'package:polymer/polymer.dart';
-import '../lib-elements/polymer_localstorage.dart';
-
-class Todo extends Observable {
-  @observable String title;
-  @observable bool completed = false;
-
-  Todo(this.title);
-
-  Todo.fromJson(Map json)
-      : title = json['title'], completed = json['completed'];
-
-  Map toJson() => { 'title': title, 'completed': completed };
-
-  String toString() => "$title (${completed ? '' : 'not '}done)";
-}
-
-@CustomTag('td-model')
-class TodoModel extends PolymerElement {
-  @published ObservableList<Todo> items;
-  @published Iterable<Todo> filtered;
-  @published String storageId;
-
-  @observable int completedCount = 0;
-  @observable int activeCount = 0;
-  @observable bool allCompleted = false;
-  @observable PolymerLocalStorage storage;
-  @observable String filter;
-  @observable String activeItemWord;
-
-  final filters = {
-    'active': (item) => !item.completed,
-    'completed': (item) => item.completed
-  };
-
-  factory TodoModel() => new Element.tag('td-model');
-  TodoModel.created() : super.created();
-
-  void ready() {
-    async((_) {
-      if (items == null) items = new ObservableList<Todo>();
-    });
-  }
-
-  void filterChanged() {
-    filterItems();
-  }
-
-  void itemsChanged() {
-    completedCount = items.where(filters['completed']).length;
-    activeCount = items.length - completedCount;
-    allCompleted = completedCount > 0 && activeCount == 0;
-
-    filterItems();
-    if (storage != null) {
-      storage.value = items;
-      storage.save();
-    }
-
-    // TODO(jmesserly): polymer_expressions lacks ternary operator.
-    activeItemWord = activeCount == 1 ? 'item' : 'items';
-  }
-
-  void storageIdChanged() {
-    storage = document.querySelector('#$storageId');
-    if (storage != null && storage.value != null) {
-      items = toObservable(storage.value.map((i) => new Todo.fromJson(i)));
-    }
-  }
-
-  void filterItems() {
-    var fn = filters[filter];
-    filtered = fn != null ? items.where(fn) : items;
-  }
-
-  void newItem(String title) {
-    title = title.trim();
-    if (title != '') {
-      items.add(new Todo(title));
-      itemsChanged();
-    }
-  }
-
-  void destroyItem(Todo item) {
-    if (items.remove(item)) itemsChanged();
-  }
-
-  void clearItems() {
-    items.removeWhere(filters['completed']);
-  }
-
-  void setItemsCompleted(bool completed) {
-    for (var item in items) {
-      item.completed = completed;
-    }
-    itemsChanged();
-  }
-}