Update all Angular libs (run update_all.sh).

third_party/pkg/angular/lib/directive/a_href.dart

+part of angular.directive;
+
+/**
+ * @ngdoc directive
+ * @name ng.directive:a
+ * @restrict E
+ *
+ * @description
+ * Modifies the default behavior of the html A tag so that the default action is
+ * prevented when the a href is empty or it contains `ng-click` directive.
+ *
+ * This change permits the easy creation of action links with the `ngClick`
+ * directive without changing the location or causing page reloads, e.g.:
+ * `<a href="" ng-click="model.save()">Save</a>`
+ */
+@Decorator(selector: 'a[href]')
+class AHref {
+  final dom.Element element;
+
+  AHref(this.element, VmTurnZone zone) {
+    if (element.attributes["href"] == "") {
+      zone.runOutsideAngular(() {
+        element.onClick.listen((event) {
+          if (element.attributes["href"] == "") {
+            event.preventDefault();
+          }
+        });
+      });
+    }
+  }
+}