Upstream Service Worker window test to WPT

third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js

Index: third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js
diff --git a/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js
index 53f210cf7634993f86310cdefec9a15fd6b699a0..50a4a5de51fbbf341f09e25ba88592cecbd0e9b4 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js
+++ b/third_party/WebKit/LayoutTests/external/wpt/service-workers/service-worker/resources/claim-worker.js
@@ -1,5 +1,5 @@
 self.addEventListener('message', function(event) {
-    self.clients.claim()
+    event.waitUntil(self.clients.claim()
       .then(function(result) {
           if (result !== undefined) {
               event.data.port.postMessage(
@@ -10,7 +10,7 @@ self.addEventListener('message', function(event) {
         })
       .catch(function(error) {
           event.data.port.postMessage('FAIL: exception: ' + error.name);
-        });
+        }));
   });
 
 self.addEventListener('fetch', function(event) {