Reland "Consolidate app banner testing."

This is a reland of 58ab87ff.

Original change's description:
> Consolidate app banner testing.
> 
> This CL removes several different app banner testing files, and replaces
> them by calling the necessary JavaScript setup code in one test file.
> For instance, all tests will no longer have the "appinstalled" title
> overwriting, as that will only be active when the appropriate setup
> JavaScript is run.
> 
> This allows future tests to be more easily added, and reduces collisions
> when manipulating the page title.
> 
> BUG=806923
> 
> Change-Id: Ia28837b8675a2e1fe329cb1df1be4798ddb03d02
> Reviewed-on: https://chromium-review.googlesource.com/892182
> Commit-Queue: Dominick Ng <dominickn@chromium.org>
> Reviewed-by: Matt Giuca <mgiuca@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#532978}

Bug: 806923
Change-Id: Ia85a5be0828ad0820a891f8cde9d9e492dc0b831
Reviewed-on: https://chromium-review.googlesource.com/896326Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533745}

chrome/android/javatests/src/org/chromium/chrome/browser/banners/AppBannerManagerTest.java

@@ -45,7 +45,6 @@ import org.chromium.chrome.browser.infobar.InfoBarContainer;
 import org.chromium.chrome.browser.infobar.InfoBarContainer.InfoBarAnimationListener;
 import org.chromium.chrome.browser.infobar.InfoBarContainerLayout.Item;
 import org.chromium.chrome.browser.profiles.Profile;
-import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.webapps.WebappDataStorage;
 import org.chromium.chrome.test.ChromeActivityTestRule;
 import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
@@ -77,8 +76,11 @@ public class AppBannerManagerTest {
     @Rule
     public CustomTabActivityTestRule mCustomTabActivityTestRule = new CustomTabActivityTestRule();
 
-    private static final String NATIVE_APP_PATH =
-            "/chrome/test/data/banners/play_app_test_page.html";
+    private static final String NATIVE_APP_MANIFEST_WITH_ID =
+            "/chrome/test/data/banners/play_app_manifest.json";
+
+    private static final String NATIVE_APP_MANIFEST_WITH_URL =
+            "/chrome/test/data/banners/play_app_url_manifest.json";
 
     private static final String NATIVE_ICON_PATH = "/chrome/test/data/banners/launcher-icon-4x.png";
 
@@ -92,14 +94,6 @@ public class AppBannerManagerTest {
 
     private static final String NATIVE_APP_BLANK_REFERRER = "playinline=chrome_inline";
 
-    private static final String NATIVE_APP_URL_WITH_MANIFEST_PATH =
-            "/chrome/test/data/banners/play_app_url_test_page.html";
-
-    private static final String WEB_APP_PATH = "/chrome/test/data/banners/manifest_test_page.html";
-
-    private static final String WEB_APP_BEFORE_INSTALL_PROMPT_PATH =
-            "/chrome/test/data/banners/prompt_test_page.html";
-
     private static final String WEB_APP_SHORT_TITLE_MANIFEST =
             "/chrome/test/data/banners/manifest_short_name_only.json";
 
@@ -193,7 +187,6 @@ public class AppBannerManagerTest {
     private TestPackageManager mPackageManager;
     private EmbeddedTestServer mTestServer;
     private String mWebAppUrl;
-    private String mWebAppApiUrl;
 
     @Before
     public void setUp() throws Exception {
@@ -215,9 +208,9 @@ public class AppBannerManagerTest {
 
         AppBannerManager.setTotalEngagementForTesting(10);
         mTestServer = EmbeddedTestServer.createAndStartServer(InstrumentationRegistry.getContext());
-        mNativeAppUrl = mTestServer.getURL(NATIVE_APP_PATH);
-        mWebAppUrl = mTestServer.getURL(WEB_APP_PATH);
-        mWebAppApiUrl = mTestServer.getURL(WEB_APP_BEFORE_INSTALL_PROMPT_PATH);
+        mNativeAppUrl = WebappTestPage.getNativeBannerUrlWithManifest(
+                mTestServer, NATIVE_APP_MANIFEST_WITH_ID);
+        mWebAppUrl = WebappTestPage.getBannerUrl(mTestServer);
     }
 
     @After
@@ -386,8 +379,9 @@ public class AppBannerManagerTest {
     @SmallTest
     @Feature({"AppBanners"})
     public void testFullNativeInstallPathwayFromUrl() throws Exception {
-        runFullNativeInstallPathway(
-                mTestServer.getURL(NATIVE_APP_URL_WITH_MANIFEST_PATH), NATIVE_APP_REFERRER);
+        runFullNativeInstallPathway(WebappTestPage.getNativeBannerUrlWithManifest(
+                                            mTestServer, NATIVE_APP_MANIFEST_WITH_URL),
+                NATIVE_APP_REFERRER);
     }
 
     @Test
@@ -604,8 +598,7 @@ public class AppBannerManagerTest {
     @Feature({"AppBanners"})
     public void testBannerFallsBackToShortNameWhenNameNotPresent() throws Exception {
         triggerWebAppBanner(mTabbedActivityTestRule,
-                WebappTestPage.urlOfPageWithServiceWorkerAndManifest(
-                        mTestServer, WEB_APP_SHORT_TITLE_MANIFEST),
+                WebappTestPage.getBannerUrlWithManifest(mTestServer, WEB_APP_SHORT_TITLE_MANIFEST),
                 WEB_APP_SHORT_TITLE, false);
     }
 
@@ -614,21 +607,43 @@ public class AppBannerManagerTest {
     @Feature({"AppBanners"})
     public void testBannerFallsBackToShortNameWhenNameIsEmpty() throws Exception {
         triggerWebAppBanner(mTabbedActivityTestRule,
-                WebappTestPage.urlOfPageWithServiceWorkerAndManifest(
-                        mTestServer, WEB_APP_EMPTY_NAME_MANIFEST),
+                WebappTestPage.getBannerUrlWithManifest(mTestServer, WEB_APP_EMPTY_NAME_MANIFEST),
                 WEB_APP_SHORT_TITLE, false);
     }
 
+    @Test
+    @MediumTest
+    @Feature({"AppBanners"})
+    public void testAppInstalledEventAutomaticPrompt() throws Exception {
+        triggerWebAppBanner(mTabbedActivityTestRule,
+                WebappTestPage.getBannerUrlWithAction(mTestServer, "verify_appinstalled"),
+                WEB_APP_TITLE, true);
+
+        // The appinstalled event should fire (and cause the title to change).
+        new TabTitleObserver(mTabbedActivityTestRule.getActivity().getActivityTab(),
+                "Got appinstalled: listener, attr")
+                .waitForTitleUpdate(3);
+    }
+
+    @Test
+    @MediumTest
+    @Feature({"AppBanners"})
+    public void testAppInstalledEventApi() throws Exception {
+        triggerWebAppBanner(mTabbedActivityTestRule,
+                WebappTestPage.getBannerUrlWithAction(mTestServer, "verify_prompt_appinstalled"),
+                WEB_APP_TITLE, true);
+
+        // The appinstalled event should fire (and cause the title to change).
+        new TabTitleObserver(mTabbedActivityTestRule.getActivity().getActivityTab(),
+                "Got appinstalled: listener, attr")
+                .waitForTitleUpdate(3);
+    }
+
     private void runWebAppBannerAndCheckInstallEvent(
             ChromeActivityTestRule<? extends ChromeActivity> rule, String webAppUrl,
             int expectedBucket) throws Exception {
         triggerWebAppBanner(rule, webAppUrl, WEB_APP_TITLE, true);
 
-        // The appinstalled event should fire (and cause the title to change).
-        Tab tab = rule.getActivity().getActivityTab();
-        new TabTitleObserver(tab, "Got appinstalled").waitForTitleUpdate(3);
-
-        // We should have recorded the AUTOMATIC_BROWSER_TAB install source.
         ThreadUtils.runOnUiThread(() -> {
             Assert.assertEquals(1,
                     RecordHistogram.getHistogramValueCountForTesting(
@@ -657,7 +672,8 @@ public class AppBannerManagerTest {
     @SmallTest
     @Feature({"AppBanners"})
     public void testPostInstallationApiBrowserTab() throws Exception {
-        runWebAppBannerAndCheckInstallEvent(mTabbedActivityTestRule, mWebAppApiUrl, 4);
+        runWebAppBannerAndCheckInstallEvent(mTabbedActivityTestRule,
+                WebappTestPage.getBannerUrlWithAction(mTestServer, "call_prompt_delayed"), 4);
     }
 
     @Test
@@ -667,7 +683,8 @@ public class AppBannerManagerTest {
         mCustomTabActivityTestRule.startCustomTabActivityWithIntent(
                 CustomTabsTestUtils.createMinimalCustomTabIntent(
                         InstrumentationRegistry.getTargetContext(), "about:blank"));
-        runWebAppBannerAndCheckInstallEvent(mCustomTabActivityTestRule, mWebAppApiUrl, 5);
+        runWebAppBannerAndCheckInstallEvent(mCustomTabActivityTestRule,
+                WebappTestPage.getBannerUrlWithAction(mTestServer, "call_prompt_delayed"), 5);
     }
 
     @Test

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/AddToHomescreenManagerTest.java

@@ -32,6 +32,7 @@ import org.chromium.chrome.test.ChromeActivityTestRule;
 import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.util.browser.TabLoadObserver;
 import org.chromium.chrome.test.util.browser.TabTitleObserver;
+import org.chromium.chrome.test.util.browser.WebappTestPage;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
 import org.chromium.content.common.ContentSwitches;
@@ -88,10 +89,6 @@ public class AddToHomescreenManagerTest {
     private static final String MANIFEST_PATH = "/chrome/test/data/banners/manifest_test_page.html";
     private static final String MANIFEST_TITLE = "Web app banner test page";
 
-    private static final String EVENT_WEBAPP_PATH =
-            "/chrome/test/data/banners/appinstalled_test_page.html";
-    private static final String EVENT_WEBAPP_TITLE = "appinstalled event test page";
-
     private static class TestShortcutHelperDelegate extends ShortcutHelper.Delegate {
         public String mRequestedShortcutTitle;
         public Intent mRequestedShortcutIntent;
@@ -302,7 +299,9 @@ public class AddToHomescreenManagerTest {
     @SmallTest
     @Feature("{Webapp}")
     public void testAddWebappShortcutAppInstalledEvent() throws Exception {
-        loadUrl(mTestServerRule.getServer().getURL(EVENT_WEBAPP_PATH), EVENT_WEBAPP_TITLE);
+        loadUrl(WebappTestPage.getBannerUrlWithAction(
+                        mTestServerRule.getServer(), "verify_appinstalled"),
+                MANIFEST_TITLE);
         addShortcutToTab(mTab, "", true);
 
         // Wait for the tab title to change. This will happen (due to the JavaScript that runs

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappNavigationTest.java

@@ -219,7 +219,7 @@ public class WebappNavigationTest {
         ChromeTabUtils.waitForTabPageLoaded(customTab.getActivityTab(), inScopeUrl);
         Assert.assertTrue(
                 mActivityTestRule.runJavaScriptCodeInCurrentTab("document.body.textContent")
-                        .contains("Do-nothing page with a service worker"));
+                        .contains("Do-nothing page with a manifest and a service worker."));
     }
 
     /**

chrome/browser/installable/installable_manager_browsertest.cc

@@ -494,7 +494,8 @@ IN_PROC_BROWSER_TEST_F(InstallableManagerBrowserTest,
 
     NavigateAndRunInstallableManager(browser(), tester.get(),
                                      GetManifestParams(),
-                                     "/banners/play_app_test_page.html");
+                                     GetURLOfPageWithServiceWorkerAndManifest(
+                                         "/banners/play_app_manifest.json"));
     run_loop.Run();
 
     EXPECT_FALSE(tester->manifest().IsEmpty());

chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/WebappTestPage.java

@@ -4,6 +4,8 @@
 
 package org.chromium.chrome.test.util.browser;
 
+import android.net.Uri;
+
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.net.test.EmbeddedTestServer;
 
@@ -14,16 +16,52 @@ public class WebappTestPage {
     /**
      * Title of pages whose URL was generated by {@link #urlOfPageWithServiceWorkerAndManifest()}.
      */
-    public static final String TITLE = "Web app banner test page";
+    public static final String WEB_APP_TITLE = "Web app banner test page";
+
+    private static final String WEB_APP_PATH = "/chrome/test/data/banners/manifest_test_page.html";
+
+    private static final String NO_SERVICE_WORKER_APP_PATH =
+            "/chrome/test/data/banners/manifest_no_service_worker.html";
+
+    /**
+     * Returns the URL of a banner-eligible page.
+     */
+    public static String getBannerUrl(EmbeddedTestServer testServer) {
+        String url = testServer.getURL(WEB_APP_PATH);
+        Uri.Builder builder = Uri.parse(url).buildUpon();
+        return builder.build().toString();
+    }
+
+    /**
+     * Returns the URL of a native banner-eligible page with the specified web manifest URL.
+     */
+    public static String getNativeBannerUrlWithManifest(
+            EmbeddedTestServer testServer, String manifestUrl) {
+        String url = testServer.getURL(NO_SERVICE_WORKER_APP_PATH);
+        Uri.Builder builder = Uri.parse(url).buildUpon();
+        builder.appendQueryParameter("manifest", manifestUrl);
+        return builder.build().toString();
+    }
 
     /**
-     * Computes URL of page which is controlled by a service worker and uses the passed in Web
-     * Manifest URL.
+     * Returns the URL of a banner-eligible page with the specified web manifest URL.
      */
-    public static String urlOfPageWithServiceWorkerAndManifest(
+    public static String getBannerUrlWithManifest(
             EmbeddedTestServer testServer, String manifestUrl) {
-        String url = "/chrome/test/data/banners/manifest_test_page.html?manifest=" + manifestUrl;
-        return testServer.getURL(url);
+        String url = testServer.getURL(WEB_APP_PATH);
+        Uri.Builder builder = Uri.parse(url).buildUpon();
+        builder.appendQueryParameter("manifest", manifestUrl);
+        return builder.build().toString();
+    }
+
+    /**
+     * Returns the URL of a banner-eligible page with the specified action query parameter.
+     */
+    public static String getBannerUrlWithAction(EmbeddedTestServer testServer, String action) {
+        String url = testServer.getURL(WEB_APP_PATH);
+        Uri.Builder builder = Uri.parse(url).buildUpon();
+        builder.appendQueryParameter("action", action);
+        return builder.build().toString();
     }
 
     /**
@@ -32,7 +70,7 @@ public class WebappTestPage {
      */
     public static void navigateToPageWithServiceWorkerAndManifest(
             EmbeddedTestServer testServer, Tab tab, String manifestUrl) throws Exception {
-        TabLoadObserver observer = new TabLoadObserver(tab, TITLE, null);
-        observer.fullyLoadUrl(urlOfPageWithServiceWorkerAndManifest(testServer, manifestUrl));
+        TabLoadObserver observer = new TabLoadObserver(tab, WEB_APP_TITLE, null);
+        observer.fullyLoadUrl(getBannerUrlWithManifest(testServer, manifestUrl));
     }
 }

chrome/test/data/banners/appinstalled_test_page.html

-<!DOCTYPE html>
-<html>
-    <head>
-        <title>appinstalled event test page</title>
-        <script>
-            // These blanks will get filled in when each event comes through.
-            var gotEventsFrom = ['________', '____'];
-
-            function setTitle() {
-              window.document.title = 'Got appinstalled: ' +
-                gotEventsFrom.join(', ');
-            }
-
-            window.addEventListener('load', () => {
-              // Test both the addEventListener and onX attribute versions.
-              // When an app is installed, each should fire once.
-              window.addEventListener('appinstalled', () => {
-                gotEventsFrom[0] = 'listener';
-                setTitle();
-              });
-              window.onappinstalled = () => {
-                gotEventsFrom[1] = 'attr';
-                setTitle();
-              };
-            });
-        </script>
-    </head>
-    <body>
-    </body>
-</html>

chrome/test/data/banners/beforeinstallprompt_test_page.html

-<!DOCTYPE html>
-<html>
-    <head>
-        <title>beforeinstallprompt event test page</title>
-        <link rel="manifest" href="manifest.json" />
-        <script src="main.js"></script>
-        <script>
-            // These blanks will get filled in when each event comes through.
-            var gotEventsFrom = ['________', '____'];
-
-            function setTitle() {
-              window.document.title = 'Got beforeinstallprompt: ' +
-                gotEventsFrom.join(', ');
-            }
-
-            window.addEventListener('load', () => {
-              // Test both the addEventListener and onX attribute versions.
-              // When a prompt is shown, each should fire once.
-              window.addEventListener('beforeinstallprompt', () => {
-                gotEventsFrom[0] = 'listener';
-                setTitle();
-              });
-              window.onbeforeinstallprompt = () => {
-                gotEventsFrom[1] = 'attr';
-                setTitle();
-              };
-            });
-        </script>
-    </head>
-    <body onload="initialize()"></body>
-</html>

chrome/test/data/banners/cancel_test_page.html

-<html>
-  <head>
-    <title>Web app banner test page</title>
-    <script src="main.js"></script>
-    <script>
-      // If a "manifest=/path/to/manifest.json" query argument is provided to
-      // the URL accessing this page, that path is injected as the manifest tag.
-      // Otherwise, "manifest.json" is used as the manifest tag.
-      addManifestLinkTag();
-
-      window.addEventListener('beforeinstallprompt', function(e) {
-        console.log('Preventing banner from appearing');
-        e.preventDefault();
-
-        // Navigate the window to trigger the banner cancellation.
-        window.location.href = "/";
-      });
-    </script>
-  </head>
-  <body onload="initialize()">Cancels the banner.</body>
-</html>

chrome/test/data/banners/main.js

@@ -2,19 +2,84 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-function initialize() {
-  navigator.serviceWorker.register('service_worker.js');
+const Action = {
+  VERIFY_APPINSTALLED: "verify_appinstalled",
+  VERIFY_PROMPT_APPINSTALLED: "verify_prompt_appinstalled",
+  VERIFY_BEFOREINSTALLPROMPT: "verify_beforeinstallprompt",
+  CALL_PROMPT_DELAYED: "call_prompt_delayed",
+  CALL_PROMPT_IN_HANDLER: "call_prompt_in_handler",
+  CANCEL_PROMPT: "cancel_prompt",
+  STASH_EVENT: "stash_event",
+};
+
+const LISTENER = "listener";
+const ATTR = "attr";
+
+// These blanks will get filled in when each event comes through.
+let gotEventsFrom = ['_'.repeat(LISTENER.length), '_'.repeat(ATTR.length)];
+
+let stashedEvent = null;
+
+function startWorker(worker) {
+  navigator.serviceWorker.register(worker);
+}
+
+function verifyEvents(eventName) {
+  function setTitle() {
+    window.document.title = 'Got ' + eventName + ': ' +
+      gotEventsFrom.join(', ');
+  }
+
+  window.addEventListener(eventName, () => {
+    gotEventsFrom[0] = LISTENER;
+    setTitle();
+  });
+  window['on' + eventName] = () => {
+    gotEventsFrom[1] = ATTR;
+    setTitle();
+  };
+}
+
+function callPrompt(event) {
+  event.prompt();
+}
+
+function callStashedPrompt() {
+  if (stashedEvent === null) {
+      throw new Error('No event was previously stashed');
+  }
+  stashedEvent.prompt();
+}
 
-  window.addEventListener('appinstalled', () => {
-    window.document.title = 'Got appinstalled';
+function addPromptListener(action) {
+  window.addEventListener('beforeinstallprompt', function(e) {
+    e.preventDefault();
+
+    switch (action) {
+      case Action.CALL_PROMPT_DELAYED:
+        setTimeout(callPrompt, 0, e);
+        break;
+      case Action.CALL_PROMPT_IN_HANDLER:
+        callPrompt(e);
+        break;
+      case Action.CANCEL_PROMPT:
+        // Navigate the window to trigger the banner cancellation.
+        window.location.href = "/";
+        break;
+      case Action.STASH_EVENT:
+        stashedEvent = e;
+        break;
+    }
   });
 }
 
 function addManifestLinkTag() {
-  var url = window.location.href;
-  var manifestIndex = url.indexOf("?manifest=");
-  var manifestUrl =
-      (manifestIndex >= 0) ? url.slice(manifestIndex + 10) : 'manifest.json';
+  const url = new URL(window.location.href);
+  let manifestUrl = url.searchParams.get('manifest');
+  if (!manifestUrl) {
+    manifestUrl = 'manifest.json';
+  }
+
   var linkTag = document.createElement("link");
   linkTag.id = "manifest";
   linkTag.rel = "manifest";
@@ -22,6 +87,40 @@ function addManifestLinkTag() {
   document.head.append(linkTag);
 }
 
+function initialize() {
+  const url = new URL(window.location.href);
+  const action = url.searchParams.get('action');
+  if (!action) {
+    return;
+  }
+
+  switch (action) {
+    case Action.VERIFY_APPINSTALLED:
+      verifyEvents('appinstalled');
+      break;
+    case Action.VERIFY_PROMPT_APPINSTALLED:
+      addPromptListener("call_prompt_delayed");
+      verifyEvents('appinstalled');
+      break;
+    case Action.VERIFY_BEFOREINSTALLPROMPT:
+      verifyEvents('beforeinstallprompt');
+      break;
+    case Action.CALL_PROMPT_DELAYED:
+    case Action.CALL_PROMPT_IN_HANDLER:
+    case Action.CANCEL_PROMPT:
+    case Action.STASH_EVENT:
+      addPromptListener(action);
+      break;
+    default:
+      throw new Error("Unrecognised action: " + action);
+  }
+}
+
+function initializeWithWorker(worker) {
+  startWorker(worker);
+  initialize();
+}
+
 function changeManifestUrl(newManifestUrl) {
   var linkTag = document.getElementById("manifest");
   linkTag.href = newManifestUrl;

chrome/test/data/banners/manifest_no_service_worker.html

 <html>
   <head>
     <title>Web app banner test page</title>
-    <link rel="manifest" href="manifest.json" />
+    <script src="main.js"></script>
+    <script>
+      // If a "manifest=/path/to/manifest.json" query argument is provided to
+      // the URL accessing this page, that path is injected as the manifest tag.
+      // Otherwise, "manifest.json" is used as the manifest tag.
+      addManifestLinkTag();
+    </script>
   </head>
   <body>
     Do-nothing page with a manifest but no service worker.

chrome/test/data/banners/manifest_test_page.html

@@ -9,7 +9,7 @@
       addManifestLinkTag();
     </script>
   </head>
-  <body onload="initialize()">
-    Do-nothing page with a service worker.
+  <body onload="initializeWithWorker('service_worker.js')">
+    Do-nothing page with a manifest and a service worker.
   </body>
 </html>

chrome/test/data/banners/no_manifest_test_page.html

@@ -3,7 +3,10 @@
     <title>Web app banner test page</title>
     <script src="main.js"></script>
   </head>
-  <body onload="initialize()">
-    Do-nothing page with a service worker, but no manifest. 
+  <script>
+    navigator.serviceWorker.register('service_worker.js');
+  </script>
+  <body>
+    Do-nothing page with a service worker, but no manifest.
   </body>
-</html>
+</html>
\ No newline at end of file

chrome/test/data/banners/no_sw_fetch_handler_test_page.html

 <html>
   <head>
-    <link rel="manifest" href="manifest.json" />
+    <title>Web app banner test page</title>
+    <script src="main.js"></script>
     <script>
-      navigator.serviceWorker.register('service_worker_no_fetch_handler.js');
+      // If a "manifest=/path/to/manifest.json" query argument is provided to
+      // the URL accessing this page, that path is injected as the manifest tag.
+      // Otherwise, "manifest.json" is used as the manifest tag.
+      addManifestLinkTag();
     </script>
   </head>
-  <body>
-    Page with a service worker missing a fetch handler.
+  <body onload="initializeWithWorker('service_worker_no_fetch_handler.js')">
+    Do-nothing page with a manifest and a service worker missing a fetch handler.
   </body>
 </html>

chrome/test/data/banners/play_app_test_page.html

-<html>
-  <head>
-    <title>Native app banner test page</title>
-    <link rel="manifest" href="play_app_manifest.json" />
-  </head>
-  <body>
-    Do-nothing page with a manifest requesting a native app banner.
-  </body>
-</html>

chrome/test/data/banners/play_app_url_test_page.html

-<html>
-  <head>
-    <title>Native app banner test page</title>
-    <link rel="manifest" href="play_app_url_manifest.json" />
-  </head>
-  <body onload="initialize()">
-    Do-nothing page with a service worker. 
-  </body>
-</html>

chrome/test/data/banners/prompt_in_handler_test_page.html

-<html>
-  <head>
-    <title>Web app banner test page</title>
-    <link rel="manifest" href="manifest.json" />
-    <script src="main.js"></script>
-    <script>
-      window.addEventListener('beforeinstallprompt', function(e) {
-        e.preventDefault();
-        e.prompt();
-      });
-    </script>
-  </head>
-  <body onload="initialize()">Cancels the banner, then prompts for it to be shown in the handler.</body>
-</html>

chrome/test/data/banners/prompt_no_preventdefault_test_page.html

-<html>
-  <head>
-    <title>Web app banner test page</title>
-    <link rel="manifest" href="manifest.json" />
-    <script src="main.js"></script>
-    <script>
-      var e = 1;
-
-      function callPrompt() {
-        e.prompt();
-      }
-
-      window.addEventListener('beforeinstallprompt', function(event) {
-        e = event;
-      });
-
-    </script>
-  </head>
-  <body onload="initialize()"></body>
-</html>

chrome/test/data/banners/prompt_test_page.html

-<html>
-  <head>
-    <title>Web app banner test page</title>
-    <link rel="manifest" href="manifest.json" />
-    <script src="main.js"></script>
-    <script>
-      function callPrompt(event) {
-        event.prompt();
-      }
-
-      window.addEventListener('beforeinstallprompt', function(e) {
-        e.preventDefault();
-        setTimeout(callPrompt, 0, e);
-      });
-
-    </script>
-  </head>
-  <body onload="initialize()">Cancels the banner, then prompts for it to be shown later.</body>
-</html>