Reland: service worker: Don't control a subframe of an insecure context

content/browser/service_worker/service_worker_registration.cc

Index: content/browser/service_worker/service_worker_registration.cc
diff --git a/content/browser/service_worker/service_worker_registration.cc b/content/browser/service_worker/service_worker_registration.cc
index d7fb0b1028c29c10de814da03e1336dfe120bc56..bad9920756875f7466faaebe8ad5b0867f13f9a9 100644
--- a/content/browser/service_worker/service_worker_registration.cc
+++ b/content/browser/service_worker/service_worker_registration.cc
@@ -201,6 +201,8 @@ void ServiceWorkerRegistration::ClaimClients() {
       continue;
     if (host->controlling_version() == active_version())
       continue;
+    if (!host->IsContextSecureForServiceWorker())
+      continue;
     if (host->MatchRegistration() == this)
       host->ClaimedByRegistration(this);
   }