fix(@schematics/angular): import zone related flags in other files

fix angular#12886

packages/schematics/angular/application/files/src/polyfills.ts

@@ -54,24 +54,10 @@
  **/
 // import 'web-animations-js';  // Run `npm install --save web-animations-js`.
 
-/**
- * By default, zone.js will patch all possible macroTask and DomEvents
- * user can disable parts of macroTask/DomEvents patch by setting following flags
- */
-
- // (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
- // (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
- // (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
-
- /*
- * in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
- * with the following flag, it will bypass `zone.js` patch for IE/Edge
- */
-// (window as any).__Zone_enable_cross_context_check = true;
-
 /***************************************************************************************************
  * Zone JS is required by default for Angular itself.
  */
+import './zone-flags';  // import zone related flags.
 import 'zone.js/dist/zone';  // Included with Angular CLI.
 
 

packages/schematics/angular/application/files/src/zone-flags.ts

@@ -0,0 +1,14 @@
+/**
+ * By default, zone.js will patch all possible macroTask and DomEvents
+ * user can disable parts of macroTask/DomEvents patch by setting following flags
+ */
+
+// (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
+// (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
+// (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
+
+/*
+ * in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
+ * with the following flag, it will bypass `zone.js` patch for IE/Edge
+ */
+// (window as any).__Zone_enable_cross_context_check = true;