a === b -> identical(a, b)

samples/swarm/App.dart

Index: samples/swarm/App.dart
diff --git a/samples/swarm/App.dart b/samples/swarm/App.dart
index 46a4679a1208a45d047ede6b1cead5086a7b6a83..ee65dbcaf54d78c7e1dd4c804a19a4d231ab9939 100644
--- a/samples/swarm/App.dart
+++ b/samples/swarm/App.dart
@@ -64,7 +64,7 @@ class App {
     final splash = document.query("#appSplash");
     // Delete it if found, but it's okay for it not to be -- maybe
     // somebody just didn't want to use our splash mechanism.
-    if (splash !== null) {
+    if (splash != null) {
       splash.remove();
     }
   }
@@ -75,7 +75,7 @@ class App {
    */
   bool swapAndReloadCache() {
     DOMApplicationCache appCache = window.applicationCache;
-    if (appCache.status !== DOMApplicationCache.UPDATEREADY) {
+    if (!identical(appCache.status, DOMApplicationCache.UPDATEREADY)) {
       return false;
     }