Add a test to cover service worker update codepath when extension is updated

chrome/test/data/extensions/api_test/service_worker/update/v2/sw.js

Index: chrome/test/data/extensions/api_test/service_worker/update/v2/sw.js
diff --git a/mojo/public/interfaces/bindings/tests/scoping.mojom b/chrome/test/data/extensions/api_test/service_worker/update/v2/sw.js
similarity index 54%
copy from mojo/public/interfaces/bindings/tests/scoping.mojom
copy to chrome/test/data/extensions/api_test/service_worker/update/v2/sw.js
index 2e9edb10b4eddfca591bdf64966238b9a75fbe2f..a33255c974a272d2cd7100bdd3513b7594957db4 100644
--- a/mojo/public/interfaces/bindings/tests/scoping.mojom
+++ b/chrome/test/data/extensions/api_test/service_worker/update/v2/sw.js
@@ -2,16 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mojo.test;
-
-interface A {
-  GetB(B& b);
-};
-
-interface B {
-  GetC(C& c);
+this.onmessage = function(e) {
+  e.ports[0].postMessage('Pong from version 2');
 };
 
-interface C {
-  D();
+this.oninstall = function(e) {
+  e.waitUntil(self.skipWaiting());
 };