refactor: move angular source to /packages rather than modules/@angular

packages/platform-browser/test/browser/rectangle_mock.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+export function createRectangle(
+    left: any /** TODO #9100 */, top: any /** TODO #9100 */, width: any /** TODO #9100 */,
+    height: any /** TODO #9100 */) {
+  return {left, top, width, height};
+}