Update all Angular libs (run update_all.sh).

third_party/pkg/angular/example/web/animation/stress_demo.dart

+part of animation;
+
+@Component(
+    selector: 'stress-demo',
+    template: '''
+      <div class="stress-demo">
+        <button ng-click="ctrl.visible = !ctrl.visible">
+          Toggle Visibility</button>
+        <div>
+          <div class="stress-box" ng-repeat="number in ctrl.numbers"></div>
+        </div>
+      </div>
+    ''',
+    publishAs: 'ctrl',
+    applyAuthorStyles: true)
+class StressDemo {
+  bool _visible = true;
+  final numbers = <int>[1, 2];
+
+  // When visibility changes add or remove a large chunk of elements.
+  void set visible(bool value) {
+    if (value) {
+      for (int i = 0; i < 200; i++) {
+        numbers.add(i);
+      }
+    } else {
+      numbers.clear();
+    }
+    _visible = value;
+  }
+
+  bool get visible => _visible;
+}