Add way for PermissionContext to be automatically restricted to secure origins.

chrome/browser/notifications/desktop_notification_service.cc

Index: chrome/browser/notifications/desktop_notification_service.cc
diff --git a/chrome/browser/notifications/desktop_notification_service.cc b/chrome/browser/notifications/desktop_notification_service.cc
index 24e1fb332d26e55183d3792423665199797c3792..bb1473c25f86ac40ed14e67d0917cf7f2096a3bc 100644
--- a/chrome/browser/notifications/desktop_notification_service.cc
+++ b/chrome/browser/notifications/desktop_notification_service.cc
@@ -253,6 +253,10 @@ void DesktopNotificationService::UpdateContentSetting(
   }
 }
 
+bool DesktopNotificationService::RestrictToSecureOrigins() const {
+  return false;

[ddorwin, 2015/05/26 17:31:31]

Are notifications really not restricted? Looking at the age of this file, I
guess it applies to more than Service Workers.

[mlamouri (slow - plz ping), 2015/05/29 14:35:15]

They are not HTTPS-only.

+}
+
 void DesktopNotificationService::FirePermissionLevelChangedEvent(
     const NotifierId& notifier_id, bool enabled) {
 #if defined(ENABLE_EXTENSIONS)