Add testing for subscription from service workers

content/renderer/push_messaging/push_messaging_dispatcher.cc

Index: content/renderer/push_messaging/push_messaging_dispatcher.cc
diff --git a/content/renderer/push_messaging/push_messaging_dispatcher.cc b/content/renderer/push_messaging/push_messaging_dispatcher.cc
index f505f93ed80e2858c01d844283293b7e76b93b5b..81c587fc4099768318c88bec586bd3e49ff35fe5 100644
--- a/content/renderer/push_messaging/push_messaging_dispatcher.cc
+++ b/content/renderer/push_messaging/push_messaging_dispatcher.cc
@@ -55,7 +55,7 @@ void PushMessagingDispatcher::subscribe(
   } else {
     PushSubscriptionOptions content_options;
     content_options.user_visible_only = options.userVisibleOnly;
-    content_options.sender_info = options.applicationServerKey.utf8();
+    content_options.sender_info = options.applicationServerKey.latin1();

[Michael van Ouwerkerk, 2016/03/30 09:50:04]

Same here.

[harkness, 2016/03/30 10:51:49]

Done.

     DoSubscribe(service_worker_registration, content_options, callbacks);
   }
 }