ServiceWorker: Bypass SW when the script doesn't have fetch handler

content/browser/service_worker/foreign_fetch_request_handler.cc

Index: content/browser/service_worker/foreign_fetch_request_handler.cc
diff --git a/content/browser/service_worker/foreign_fetch_request_handler.cc b/content/browser/service_worker/foreign_fetch_request_handler.cc
index 59fe4846dfdedca40e239a131337244232f20f80..9eddf9688cfb265c2c4f45bdc75ff71225d9c22b 100644
--- a/content/browser/service_worker/foreign_fetch_request_handler.cc
+++ b/content/browser/service_worker/foreign_fetch_request_handler.cc
@@ -197,7 +197,8 @@ void ForeignFetchRequestHandler::DidFindRegistration(
       origin_matches = true;
   }
 
-  if (!scope_matches || !origin_matches) {
+  if (!scope_matches || !origin_matches ||
+      !active_version->has_fetch_handler()) {

[Marijn Kruisselbrink, 2016/05/27 16:18:12]

This is probably not correct. Foreign fetch events get delivered to the
"foreignfetch" event, not the "fetch" event.

[shimazu, 2016/05/30 05:41:59]

Sorry, it's true!
Done.

     job->FallbackToNetwork();
     return;
   }