Register a Service Worker when an extension is enabled.

apps/shell/browser/shell_extension_system.cc

Index: apps/shell/browser/shell_extension_system.cc
diff --git a/apps/shell/browser/shell_extension_system.cc b/apps/shell/browser/shell_extension_system.cc
index 3eb11520d90c7a4ea5c1845fe174804a90d0c2e4..d8d2176ebf0b1fed9b0874a78fc630b75ef23d26 100644
--- a/apps/shell/browser/shell_extension_system.cc
+++ b/apps/shell/browser/shell_extension_system.cc
@@ -63,6 +63,9 @@ bool ShellExtensionSystem::LoadAndLaunchApp(const base::FilePath& app_dir) {
 
   RegisterExtensionWithRequestContexts(extension);
 
+  if (BackgroundInfo::HasServiceWorker(extension))
+    ServiceWorkerManager::Get(browser_context_)->RegisterExtension(extension);
+
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_LOADED,
       content::Source<BrowserContext>(browser_context_),