When navigation focuses a web contents, also activate its window.

chrome/test/data/notifications/notification_tester.html

Index: chrome/test/data/notifications/notification_tester.html
diff --git a/chrome/test/data/notifications/notification_tester.html b/chrome/test/data/notifications/notification_tester.html
index 20de190962ee4f1e2b6d12586a606e3223c07481..2cfc5f6a39eba7cd5756d9306049646786a48f85 100644
--- a/chrome/test/data/notifications/notification_tester.html
+++ b/chrome/test/data/notifications/notification_tester.html
@@ -14,12 +14,13 @@ var g_permissionGranted = false;
 // Returns an id for the notification, which can be used to cancel it with
 // |cancelNotification|. If two notifications are created with the same
 // tag, the second one should replace the first.
-function createNotification(iconUrl, title, text, tag) {
+function createNotification(iconUrl, title, text, tag, onclick) {
   var notification = new Notification(title, {
     icon: iconUrl,
     body: text,
     tag: tag
   });
+  notification.onclick = onclick;
 
   createNotificationHelper(notification, true);
 }