Limit Link header based SW installations for fetches made by SW.

content/browser/service_worker/service_worker_provider_host.h

Index: content/browser/service_worker/service_worker_provider_host.h
diff --git a/content/browser/service_worker/service_worker_provider_host.h b/content/browser/service_worker/service_worker_provider_host.h
index 24d33e0711e31909defc5cce81f9af920bb3328b..a53f8a3a75fb76afe74b8e4696a8d3557a87b426 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -262,6 +262,7 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
   void NotifyControllerLost();
 
  private:
+  friend class LinkHeaderServiceWorkerTest;
   friend class ServiceWorkerProviderHostTestP;
   friend class ServiceWorkerWriteToCacheJobTest;
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerWriteToCacheJobTest, Update_SameScript);