refactor(platform-browser): Remove setGlobalVar from DOM adapter

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

@@ -6,6 +6,8 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {ɵglobal as global} from '@angular/core';
+
 const CAMEL_CASE_REGEXP = /([A-Z])/g;
 const DASH_CASE_REGEXP = /-([a-z])/g;
 
@@ -17,3 +19,19 @@ export function camelCaseToDashCase(input: string): string {
 export function dashCaseToCamelCase(input: string): string {
   return input.replace(DASH_CASE_REGEXP, (...m: string[]) => m[1].toUpperCase());
 }
+
+/**
+ * Exports the value under a given `name` in the global property `ng`. For example `ng.probe` if
+ * `name` is `'probe'`.
+ * @param name Name under which it will be exported. Keep in mind this will be a property of the
+ * global `ng` object.
+ * @param value The value to export.
+ */
+export function exportNgVar(name: string, value: any): void {
+  if (!ng) {
+    global['ng'] = ng = (global['ng'] as{[key: string]: any} | undefined) || {};
+  }
+  ng[name] = value;
+}
+
+let ng: {[key: string]: any}|undefined;