Updating Angular version

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

+part of angular.directive;
+
+abstract class NgControl {
+  static const NG_VALID_CLASS    = "ng-valid";
+  static const NG_INVALID_CLASS  = "ng-invalid";
+  static const NG_PRISTINE_CLASS = "ng-pristine";
+  static const NG_DIRTY_CLASS    = "ng-dirty";
+
+  String _name;
+  bool _dirty;
+  bool _pristine;
+  bool _valid;
+  bool _invalid;
+
+  get element => null;
+
+  get name => _name;
+  set name(name) => _name = name;
+
+  get pristine => _pristine;
+  set pristine(value) {
+    _pristine = true;
+    _dirty = false;
+
+    element.classes.remove(NG_DIRTY_CLASS);
+    element.classes.add(NG_PRISTINE_CLASS);
+  }
+
+  get dirty => _dirty;
+  set dirty(value) {
+    _dirty = true;
+    _pristine = false;
+
+    element.classes.remove(NG_PRISTINE_CLASS);
+    element.classes.add(NG_DIRTY_CLASS);
+  }
+
+  get valid => _valid;
+  set valid(value) {
+    _invalid = false;
+    _valid = true;
+
+    element.classes.remove(NG_INVALID_CLASS);
+    element.classes.add(NG_VALID_CLASS);
+  }
+
+  get invalid => _invalid;
+  set invalid(value) {
+    _valid = false;
+    _invalid = true;
+
+    element.classes.remove(NG_VALID_CLASS);
+    element.classes.add(NG_INVALID_CLASS);
+  }
+
+}