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

chrome/browser/banners/app_banner_manager_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 215 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest, WebAppBannerCreated) {
   std::unique_ptr<AppBannerManagerTest> manager(
       CreateAppBannerManager(browser()));
   std::vector<double> engagement_scores{0, 10};
   RunBannerTest(browser(), manager.get(), "/banners/manifest_test_page.html",
                 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(
       CreateAppBannerManager(browser()));
   std::vector<double> engagement_scores{10};
   RunBannerTest(browser(), manager.get(), "/banners/manifest_test_page.html",
                 engagement_scores, SHOWING_WEB_APP_BANNER, true);
 }
 
 IN_PROC_BROWSER_TEST_F(AppBannerManagerBrowserTest,
                        WebAppBannerCreatedAfterSeveralVisits) {
@@ skipping 278 matching lines @@
   EXPECT_FALSE(manager->will_show());
   EXPECT_FALSE(manager->is_active());
   EXPECT_FALSE(manager->need_to_log_status());
 
   histograms.ExpectTotalCount(banners::kMinutesHistogram, 0);
   histograms.ExpectUniqueSample(banners::kInstallableStatusCodeHistogram,
                                 INSUFFICIENT_ENGAGEMENT, 1);
 }
 
 }  // namespace banners