Allow banners to trigger on sites which don't register a service worker onload.

chrome/browser/banners/app_banner_manager_browsertest.cc

Index: chrome/browser/banners/app_banner_manager_browsertest.cc
diff --git a/chrome/browser/banners/app_banner_manager_browsertest.cc b/chrome/browser/banners/app_banner_manager_browsertest.cc
index 61565d65a29f0d43ffaf58f77df0cf531ccf7ad5..fb4fa4f531860998780e18affb004742072f7a95 100644
--- a/chrome/browser/banners/app_banner_manager_browsertest.cc
+++ b/chrome/browser/banners/app_banner_manager_browsertest.cc
@@ -232,6 +232,16 @@ IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest, WebAppBannerCreated) {
                 engagement_scores, SHOWING_WEB_APP_BANNER, true);
 }
 
+IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest,
+                       WebAppBannerLazyServiceWorker) {
+  std::unique_ptr<AppBannerManagerTest> manager(
+      CreateAppBannerManager(browser()));
+  std::vector<double> engagement_scores{0, 10};
+  RunBannerTest(browser(), manager.get(),
+                "/banners/lazy_service_worker_test_page.html",
+                engagement_scores, SHOWING_WEB_APP_BANNER, true);
+}
+
 IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest,
                        WebAppBannerCreatedImmediately) {
   std::unique_ptr<AppBannerManagerTest> manager(