Adding Angular and dependent packages for testing

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

+part of angular.directive;
+
+/**
+ * Creates a binding that will innerHTML the result of evaluating the
+ * `expression` bound to `ng-bind-html` into the current element in a secure
+ * way.  This expression must evaluate to a string.  The innerHTML-ed content
+ * will be sanitized using a default [NodeValidator] constructed as `new
+ * dom.NodeValidatorBuilder.common()`.  In a future version, when Strict
+ * Contextual Escaping support has been added to Angular.dart, this directive
+ * will allow one to bypass the sanitizaton and innerHTML arbitrary trusted
+ * HTML.
+ *
+ * Example:
+ *
+ *     <div ng-bind-html="htmlVar"></div>
+ */
+@NgDirective(
+  selector: '[ng-bind-html]',
+  map: const {'ngBindHtml': '=>value'})
+class NgBindHtmlDirective {
+  // The default HTML sanitizer.  Eventually, we'll make this configurable or
+  // use an optionally loaded `$sanitize` service.
+  static final dom.NodeValidator validator = new dom.NodeValidatorBuilder.common();
+
+  dom.Element element;
+
+  NgBindHtmlDirective(this.element);
+
+  /**
+   * Parsed expression from the `ng-bind-html` attribute.  The result of this
+   * expression is innerHTML'd according to the rules specified in this class'
+   * documention.
+   */
+  set value(value) => element.setInnerHtml((value == null ? '' : value.toString()),
+                                           validator: validator) ;
+}