Update all Angular libs (run update_all.sh).

third_party/pkg/angular/lib/core_dom/ng_element.dart

Index: third_party/pkg/angular/lib/core_dom/ng_element.dart
diff --git a/third_party/pkg/angular/lib/core_dom/ng_element.dart b/third_party/pkg/angular/lib/core_dom/ng_element.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b6d12d022f0f87903e9d4e4b6e0fa2d3b16da43e
--- /dev/null
+++ b/third_party/pkg/angular/lib/core_dom/ng_element.dart
@@ -0,0 +1,67 @@
+part of angular.core.dom_internal;
+
+@Injectable()
+class NgElement {
+  static const _TO_BE_REMOVED = const Object();
+
+  final dom.Element node;
+  final Scope _scope;
+  final Animate _animate;
+
+  final _classesToUpdate = <String, bool>{};
+  final _attributesToUpdate = <String, dynamic>{};
+
+  bool _writeScheduled = false;
+
+  NgElement(this.node, this._scope, this._animate);
+
+  void addClass(String className) {
+    _scheduleDomWrite();
+    _classesToUpdate[className] = true;
+  }
+
+  void removeClass(String className) {
+    _scheduleDomWrite();
+    _classesToUpdate[className] = false;
+  }
+
+  void setAttribute(String attrName, [value = '']) {
+    _scheduleDomWrite();
+    _attributesToUpdate[attrName] = value == null ? '' : value;
+  }
+
+  void removeAttribute(String attrName) {
+    _scheduleDomWrite();
+    _attributesToUpdate[attrName] = _TO_BE_REMOVED;
+  }
+
+  /// Schedules a DOM write for the next flush phase
+  _scheduleDomWrite() {
+    if (!_writeScheduled) {
+      _writeScheduled = true;
+      _scope.rootScope.domWrite(() {
+        _writeToDom();
+        _writeScheduled = false;
+      });
+    }
+  }
+
+  /// Executes scheduled DOM update - this should be called from the flush phase
+  _writeToDom() {
+    _classesToUpdate.forEach((String className, bool toBeAdded) {
+      toBeAdded
+        ? _animate.addClass(node, className)
+        : _animate.removeClass(node, className);
+    });
+    _classesToUpdate.clear();
+
+    _attributesToUpdate.forEach((String attrName, value) {
+      if (value == _TO_BE_REMOVED) {
+        node.attributes.remove(attrName);
+      } else {
+        node.attributes[attrName] = value;
+      }
+    });
+    _attributesToUpdate.clear();
+  }
+}