Adding Angular and dependent packages for testing

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

Index: third_party/pkg/angular/lib/core_dom/ng_mustache.dart
diff --git a/third_party/pkg/angular/lib/core_dom/ng_mustache.dart b/third_party/pkg/angular/lib/core_dom/ng_mustache.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ca5ad1e6c52c38c825d61acbcd8d204a3630f687
--- /dev/null
+++ b/third_party/pkg/angular/lib/core_dom/ng_mustache.dart
@@ -0,0 +1,36 @@
+part of angular.core.dom;
+
+@NgDirective(selector: r':contains(/{{.*}}/)')
+class NgTextMustacheDirective {
+  // This Directive is special and does not go through injection.
+  NgTextMustacheDirective(dom.Node element,
+                          String markup,
+                          Interpolate interpolate,
+                          Scope scope,
+                          TextChangeListener listener) {
+    Interpolation interpolation = interpolate(markup);
+    interpolation.setter = (text) {
+      element.text = text;
+      if (listener != null) listener.call(text);
+    };
+    interpolation.setter('');
+    scope.$watchSet(interpolation.watchExpressions, interpolation.call, markup.trim());
+  }
+
+}
+
+@NgDirective(selector: r'[*=/{{.*}}/]')
+class NgAttrMustacheDirective {
+  static RegExp ATTR_NAME_VALUE_REGEXP = new RegExp(r'^([^=]+)=(.*)$');
+
+// This Directive is special and does not go through injection.
+  NgAttrMustacheDirective(NodeAttrs attrs, String markup, Interpolate interpolate, Scope scope) {
+    var match = ATTR_NAME_VALUE_REGEXP.firstMatch(markup);
+    var attrName = match[1];
+    Interpolation interpolation = interpolate(match[2]);
+    interpolation.setter = (text) => attrs[attrName] = text;
+    interpolation.setter('');
+    scope.$watchSet(interpolation.watchExpressions, interpolation.call, markup.trim());
+  }
+}
+