[ServiceWorker] Tests for WindowClient.focus().

LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js

Index: LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js
diff --git a/LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js b/LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js
index 9beaf6be44e01ac2c9dc3daf41758775f5f445ac..7c7c511f579c426fd66512cfa396bddf9abd946a 100644
--- a/LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js
+++ b/LayoutTests/http/tests/serviceworker/chromium/resources/clients-openwindow.js
@@ -1,5 +1,5 @@
 // This helper will setup a small test framework that will use TESTS and run
-// them iteratively and call self.postMessage('quit') when done.
+// them sequentially and call self.postMessage('quit') when done.
 // This helper also exposes |client|, |postMessage()|, |runNextTestOrQuit()|,
 // |synthesizeNotificationClick()| and |initialize()|.
 importScripts('sw-test-helpers.js');
@@ -45,7 +45,7 @@ var TESTS = [
 ];
 
 self.onmessage = function(e) {
-    if (e.data == "start") {
+    if (e.data == 'start') {
         initialize().then(runNextTestOrQuit);
     } else {
         initialize().then(function() {
@@ -53,4 +53,4 @@ self.onmessage = function(e) {
             self.postMessage('quit');
         });
     }
-}
+};