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

packages/platform-browser/src/dom/dom_tokens.ts

@@ -0,0 +1,19 @@
+/**
+ * @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
+ */
+
+import {InjectionToken} from '@angular/core';
+
+/**
+ * A DI Token representing the main rendering context. In a browser this is the DOM Document.
+ *
+ * Note: Document might not be available in the Application Context when Application and Rendering
+ * Contexts are not the same (e.g. when running the application into a Web Worker).
+ *
+ * @stable
+ */
+export const DOCUMENT = new InjectionToken<Document>('DocumentToken');