Reland WebAPK Site Settings Shortcut using startActivityForResult.

Bug: 1138210
Change-Id: I95d57fb3fe0802298fad44d4415aaac7e87871bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510250Reviewed-by: Peter Conn <peconn@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824882}

chrome/android/chrome_test_java_sources.gni

@@ -75,6 +75,7 @@ chrome_test_java_sources = [
   "javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkPersonalizedSigninPromoTest.java",
   "javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java",
   "javatests/src/org/chromium/chrome/browser/bookmarks/bottomsheet/BookmarkBottomSheetTest.java",
+  "javatests/src/org/chromium/chrome/browser/browserservices/ManageTrustedWebActivityDataActivityTest.java",
   "javatests/src/org/chromium/chrome/browser/browserservices/OriginVerifierTest.java",
   "javatests/src/org/chromium/chrome/browser/browserservices/QualityEnforcerTest.java",
   "javatests/src/org/chromium/chrome/browser/browserservices/RunningInChromeTest.java",

chrome/android/expectations/monochrome_public_bundle.AndroidManifest.expected

@@ -1116,6 +1116,7 @@
         <category android:name="androidx.browser.customtabs.category.NavBarColorCustomization"/>
         <category android:name="androidx.browser.trusted.category.ImmersiveMode"/>
         <category android:name="androidx.browser.trusted.category.LaunchSiteSettings"/>
+        <category android:name="androidx.browser.trusted.category.LaunchWebApkSiteSettings"/>
         <category android:name="androidx.browser.trusted.category.TrustedWebActivities"/>
         <category android:name="androidx.browser.trusted.category.TrustedWebActivitySplashScreensV1"/>
         <category android:name="androidx.browser.trusted.category.WebShareTargetV2"/>

chrome/android/expectations/trichrome_chrome_bundle.AndroidManifest.expected

@@ -1018,6 +1018,7 @@
         <category android:name="androidx.browser.customtabs.category.NavBarColorCustomization"/>
         <category android:name="androidx.browser.trusted.category.ImmersiveMode"/>
         <category android:name="androidx.browser.trusted.category.LaunchSiteSettings"/>
+        <category android:name="androidx.browser.trusted.category.LaunchWebApkSiteSettings"/>
         <category android:name="androidx.browser.trusted.category.TrustedWebActivities"/>
         <category android:name="androidx.browser.trusted.category.TrustedWebActivitySplashScreensV1"/>
         <category android:name="androidx.browser.trusted.category.WebShareTargetV2"/>

chrome/android/java/AndroidManifest.xml

@@ -1069,6 +1069,7 @@ by a child template that "extends" this file.
               <category android:name="androidx.browser.customtabs.category.NavBarColorCustomization"/>
               <category android:name="androidx.browser.trusted.category.ImmersiveMode"/>
               <category android:name="androidx.browser.trusted.category.LaunchSiteSettings" />
+              <category android:name="androidx.browser.trusted.category.LaunchWebApkSiteSettings"/>
               <category android:name="androidx.browser.trusted.category.TrustedWebActivities"/>
               <category android:name="androidx.browser.trusted.category.TrustedWebActivitySplashScreensV1"/>
               <category android:name="androidx.browser.trusted.category.WebShareTargetV2"/>

chrome/android/java/src/org/chromium/chrome/browser/browserservices/ManageTrustedWebActivityDataActivity.java

@@ -7,6 +7,7 @@ package org.chromium.chrome.browser.browserservices;
 import android.os.Bundle;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.browser.customtabs.CustomTabsSessionToken;
 
@@ -14,6 +15,7 @@ import org.chromium.base.Log;
 import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
 import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
+import org.chromium.webapk.lib.common.WebApkConstants;
 
 /**
  * Launched by Trusted Web Activity apps when the user clears data.
@@ -25,15 +27,20 @@ public class ManageTrustedWebActivityDataActivity extends AppCompatActivity {
 
     private static final String TAG = "TwaDataActivity";
 
+    private static String sMockCallingPackage;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        launchSettings();
+
+        String urlToLaunchSettingsFor = getIntent().getData().toString();
+        boolean isWebApk = getIntent().getBooleanExtra(WebApkConstants.EXTRA_IS_WEBAPK, false);
+        launchSettings(urlToLaunchSettingsFor, isWebApk);
         finish();
     }
 
-    private void launchSettings() {
-        String packageName = getClientPackageName();
+    private void launchSettings(@Nullable String urlToLaunchSettingsFor, boolean isWebApk) {
+        String packageName = getClientPackageName(isWebApk);
         if (packageName == null) {
             logNoPackageName();
             finish();
@@ -41,11 +48,26 @@ public class ManageTrustedWebActivityDataActivity extends AppCompatActivity {
         }
         new TrustedWebActivityUmaRecorder(ChromeBrowserInitializer.getInstance())
                 .recordOpenedSettingsViaManageSpace();
-        TrustedWebActivitySettingsLauncher.launchForPackageName(this, packageName);
+
+        if (isWebApk) {
+            TrustedWebActivitySettingsLauncher.launchForWebApkPackageName(
+                    this, packageName, urlToLaunchSettingsFor);
+        } else {
+            TrustedWebActivitySettingsLauncher.launchForPackageName(this, packageName);
+        }
+    }
+
+    @VisibleForTesting
+    public static void setCallingPackageForTesting(String packageName) {
+        sMockCallingPackage = packageName;
     }
 
     @Nullable
-    private String getClientPackageName() {
+    private String getClientPackageName(boolean isWebApk) {
+        if (isWebApk) {
+            return sMockCallingPackage != null ? sMockCallingPackage : getCallingPackage();
+        }
+
         CustomTabsSessionToken session =
                 CustomTabsSessionToken.getSessionTokenFromIntent(getIntent());
         if (session == null) {

chrome/android/java/src/org/chromium/chrome/browser/browserservices/TrustedWebActivitySettingsLauncher.java

@@ -13,10 +13,12 @@ import org.chromium.base.Log;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.settings.SettingsLauncher;
 import org.chromium.chrome.browser.settings.SettingsLauncherImpl;
+import org.chromium.chrome.browser.webapps.ChromeWebApkHost;
 import org.chromium.components.browser_ui.site_settings.AllSiteSettings;
 import org.chromium.components.browser_ui.site_settings.SettingsNavigationSource;
 import org.chromium.components.browser_ui.site_settings.SingleWebsiteSettings;
 import org.chromium.components.browser_ui.site_settings.SiteSettingsCategory;
+import org.chromium.components.webapk.lib.client.WebApkValidator;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -33,13 +35,8 @@ public class TrustedWebActivitySettingsLauncher {
      * able to work with each of them.
      */
     public static void launchForPackageName(Context context, String packageName) {
-        int applicationUid;
-        try {
-            applicationUid = context.getPackageManager().getApplicationInfo(packageName, 0).uid;
-        } catch (PackageManager.NameNotFoundException e) {
-            Log.d(TAG, "Package " + packageName + " not found");
-            return;
-        }
+        Integer applicationUid = getApplicationUid(context, packageName);
+        if (applicationUid == null) return;
 
         ClientAppDataRegister register = new ClientAppDataRegister();
         Collection<String> domains = register.getDomainsForRegisteredUid(applicationUid);
@@ -51,6 +48,33 @@ public class TrustedWebActivitySettingsLauncher {
         launch(context, origins, domains);
     }
 
+    /**
+     * Launches site-settings for a WebApk with a given package name and associated url.
+     */
+    public static void launchForWebApkPackageName(
+            Context context, String packageName, String webApkUrl) {
+        if (!WebApkValidator.canWebApkHandleUrl(context, packageName, webApkUrl)) {
+            Log.d(TAG, "WebApk " + packageName + " can't handle url " + webApkUrl);
+            return;
+        }
+        if (getApplicationUid(context, packageName) == null) return;
+
+        // Handle the case when settings are selected but Chrome was not running.
+        ChromeWebApkHost.init();
+        openSingleWebsitePrefs(context, webApkUrl);
+    }
+
+    private static Integer getApplicationUid(Context context, String packageName) {
+        int applicationUid;
+        try {
+            applicationUid = context.getPackageManager().getApplicationInfo(packageName, 0).uid;
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.d(TAG, "Package " + packageName + " not found");
+            return null;
+        }
+        return applicationUid;
+    }
+
     /**
      * Same as above, but with list of associated origins and domains already retrieved.
      */

chrome/android/javatests/src/org/chromium/chrome/browser/browserservices/ManageTrustedWebActivityDataActivityTest.java

+// Copyright 2020 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.
+
+package org.chromium.chrome.browser.browserservices;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+import android.support.test.InstrumentationRegistry;
+
+import androidx.test.filters.MediumTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.chromium.base.ApplicationStatus;
+import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.base.test.util.Matchers;
+import org.chromium.chrome.browser.flags.ChromeSwitches;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
+import org.chromium.components.webapk.lib.client.WebApkValidator;
+import org.chromium.content_public.browser.test.util.Criteria;
+import org.chromium.content_public.browser.test.util.CriteriaHelper;
+import org.chromium.webapk.lib.common.WebApkConstants;
+
+/**
+ * Instrumentation tests for launching site settings for WebApks.
+ * Site settings are added as a dynamic android shortcut.
+ * The shortcut launches a {@link ManageTrustedWebActivityDataActivity}
+ * intent that validates the WebApk and launches the chromium SettingsActivity.
+ */
+@RunWith(ChromeJUnit4ClassRunner.class)
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE})
+public class ManageTrustedWebActivityDataActivityTest {
+    private static final String SETTINGS_ACTIVITY_NAME =
+            "org.chromium.chrome.browser.settings.SettingsActivity";
+    private static final String WEBAPK_TEST_URL = "https://www.example.com";
+    private static final String TEST_PACKAGE_NAME =
+            InstrumentationRegistry.getTargetContext().getPackageName();
+
+    @Test
+    @MediumTest
+    public void launchesWebApkSiteSettings() throws Exception {
+        WebApkValidator.setDisableValidationForTesting(true);
+        ManageTrustedWebActivityDataActivity.setCallingPackageForTesting(TEST_PACKAGE_NAME);
+        TrustedWebActivityTestUtil.spoofVerification(TEST_PACKAGE_NAME, WEBAPK_TEST_URL);
+        launchSettings(TEST_PACKAGE_NAME, Uri.parse(WEBAPK_TEST_URL));
+
+        // Check settings activity is running.
+        CriteriaHelper.pollUiThread(() -> {
+            try {
+                Criteria.checkThat("Site settings activity was not launched",
+                        siteSettingsActivityRunning(), Matchers.is(true));
+            } catch (PackageManager.NameNotFoundException e) {
+                e.printStackTrace();
+            }
+        });
+    }
+
+    private boolean siteSettingsActivityRunning() throws PackageManager.NameNotFoundException {
+        for (Activity a : ApplicationStatus.getRunningActivities()) {
+            String activityName =
+                    a.getPackageManager().getActivityInfo(a.getComponentName(), 0).name;
+            if (activityName.equals(SETTINGS_ACTIVITY_NAME)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static void launchSettings(String packageName, Uri uri) {
+        Intent intent = new Intent();
+        intent.setAction(
+                "android.support.customtabs.action.ACTION_MANAGE_TRUSTED_WEB_ACTIVITY_DATA");
+        intent.setPackage(packageName);
+        intent.setData(uri);
+        intent.putExtra(WebApkConstants.EXTRA_IS_WEBAPK, true);
+        // The following flag is required because the test starts the intent outside of an activity.
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        InstrumentationRegistry.getInstrumentation().startActivitySync(intent);
+    }
+}

chrome/android/webapk/libs/common/src/org/chromium/webapk/lib/common/WebApkConstants.java

@@ -33,6 +33,7 @@ public final class WebApkConstants {
             "org.chromium.chrome.browser.webapk.splash_provided_by_webapk";
     // Tells the host browser to relaunch the WebAPK.
     public static final String EXTRA_RELAUNCH = "org.chromium.webapk.relaunch";
+    public static final String EXTRA_IS_WEBAPK = "org.chromium.webapk.is_webapk";
 
     // Must be kept in sync with chrome/browser/android/shortcut_info.h.
     public static final int SHORTCUT_SOURCE_UNKNOWN = 0;

chrome/android/webapk/shell_apk/AndroidManifest.xml

@@ -32,6 +32,10 @@
             <category android:name="android.intent.category.BROWSABLE" />
             <data android:scheme="https" />
         </intent>
+        <intent>
+            <action android:name="android.support.customtabs.action.ACTION_MANAGE_TRUSTED_WEB_ACTIVITY_DATA" />
+            <data android:scheme="https" />
+        </intent>
     </queries>
 
     <application
@@ -59,6 +63,10 @@
             {{{raw_intent_filters}}}
          </activity>
 
+        <activity android:name="org.chromium.webapk.shell_apk.ManageDataLauncherActivity"
+            android:theme="@android:style/Theme.Translucent.NoTitleBar">
+        </activity>
+
         <activity android:name="org.chromium.webapk.shell_apk.h2o.H2OOpaqueMainActivity"
                   android:theme="@style/SplashTheme"
                   android:relinquishTaskIdentity="true"

chrome/android/webapk/shell_apk/BUILD.gn

@@ -61,6 +61,7 @@ template("webapk_java") {
       "src/org/chromium/webapk/shell_apk/IdentityService.java",
       "src/org/chromium/webapk/shell_apk/InstallHostBrowserDialog.java",
       "src/org/chromium/webapk/shell_apk/LaunchHostBrowserSelector.java",
+      "src/org/chromium/webapk/shell_apk/ManageDataLauncherActivity.java",
       "src/org/chromium/webapk/shell_apk/TransparentLauncherActivity.java",
       "src/org/chromium/webapk/shell_apk/WebApkSharedPreferences.java",
       "src/org/chromium/webapk/shell_apk/WebApkUtils.java",
@@ -150,6 +151,7 @@ template("webapk_tmpl") {
 
   android_resources(_resources_target_name) {
     sources = [
+      "res/drawable-hdpi/ic_site_settings.png",
       "res/drawable-hdpi/last_resort_runtime_host_logo.png",
       "res/drawable-hdpi/notification_badge.png",
       "res/drawable-hdpi/shortcut_1_icon.png",
@@ -157,24 +159,28 @@ template("webapk_tmpl") {
       "res/drawable-hdpi/shortcut_3_icon.png",
       "res/drawable-hdpi/shortcut_4_icon.png",
       "res/drawable-hdpi/splash_icon.xml",
+      "res/drawable-mdpi/ic_site_settings.png",
       "res/drawable-mdpi/notification_badge.png",
       "res/drawable-mdpi/shortcut_1_icon.png",
       "res/drawable-mdpi/shortcut_2_icon.png",
       "res/drawable-mdpi/shortcut_3_icon.png",
       "res/drawable-mdpi/shortcut_4_icon.png",
       "res/drawable-mdpi/splash_icon.xml",
+      "res/drawable-xhdpi/ic_site_settings.png",
       "res/drawable-xhdpi/notification_badge.png",
       "res/drawable-xhdpi/shortcut_1_icon.png",
       "res/drawable-xhdpi/shortcut_2_icon.png",
       "res/drawable-xhdpi/shortcut_3_icon.png",
       "res/drawable-xhdpi/shortcut_4_icon.png",
       "res/drawable-xhdpi/splash_icon.xml",
+      "res/drawable-xxhdpi/ic_site_settings.png",
       "res/drawable-xxhdpi/notification_badge.png",
       "res/drawable-xxhdpi/shortcut_1_icon.png",
       "res/drawable-xxhdpi/shortcut_2_icon.png",
       "res/drawable-xxhdpi/shortcut_3_icon.png",
       "res/drawable-xxhdpi/shortcut_4_icon.png",
       "res/drawable-xxhdpi/splash_icon.xml",
+      "res/drawable-xxxhdpi/ic_site_settings.png",
       "res/drawable-xxxhdpi/notification_badge.png",
       "res/drawable-xxxhdpi/shortcut_1_icon.png",
       "res/drawable-xxxhdpi/shortcut_2_icon.png",

chrome/android/webapk/shell_apk/current_version/current_version.gni

@@ -12,4 +12,4 @@
 # //chrome/android/webapk/shell_apk:webapk is changed. This includes
 # Java files, Android resource files and AndroidManifest.xml. Does not affect
 # Chrome.apk
-current_shell_apk_version = 132
+current_shell_apk_version = 133

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/HostBrowserLauncher.java

@@ -34,8 +34,6 @@ public class HostBrowserLauncher {
      * Otherwise, launches the host browser in tabbed mode.
      */
     public static void launch(Activity activity, HostBrowserLauncherParams params) {
-        Log.v(TAG, "WebAPK Launch URL: " + params.getStartUrl());
-
         if (HostBrowserUtils.shouldLaunchInTab(params)) {
             launchInTab(activity.getApplicationContext(), params);
             return;
@@ -48,6 +46,8 @@ public class HostBrowserLauncher {
     /** Launches host browser in WebAPK mode. */
     public static void launchBrowserInWebApkMode(Activity activity,
             HostBrowserLauncherParams params, Bundle extraExtras, int flags, boolean expectResult) {
+        ManageDataLauncherActivity.updateSiteSettingsShortcut(
+                activity.getApplicationContext(), params);
         Intent intent = new Intent();
         intent.setAction(ACTION_START_WEBAPK);
         intent.setPackage(params.getHostBrowserPackageName());
@@ -102,6 +102,7 @@ public class HostBrowserLauncher {
 
     /** Launches a WebAPK in its runtime host browser as a tab. */
     private static void launchInTab(Context context, HostBrowserLauncherParams params) {
+        ManageDataLauncherActivity.updateSiteSettingsShortcut(context, params);
         Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(params.getStartUrl()));
         intent.setPackage(params.getHostBrowserPackageName());
         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ManageDataLauncherActivity.java

+// Copyright 2020 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.
+
+package org.chromium.webapk.shell_apk;
+
+import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.ShortcutInfo;
+import android.content.pm.ShortcutManager;
+import android.graphics.drawable.Icon;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.ProgressBar;
+import android.widget.Toast;
+
+import org.chromium.webapk.lib.common.WebApkConstants;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Handles site settings shortcuts for WebApks. The shortcut opens the web
+ * browser's site settings for the start url associated with the WebApk.
+ */
+public class ManageDataLauncherActivity extends Activity {
+    public static final String ACTION_SITE_SETTINGS =
+            "android.support.customtabs.action.ACTION_MANAGE_TRUSTED_WEB_ACTIVITY_DATA";
+
+    public static final String SITE_SETTINGS_SHORTCUT_ID =
+            "android.support.customtabs.action.SITE_SETTINGS_SHORTCUT";
+
+    private static final String EXTRA_SITE_SETTINGS_URL = "SITE_SETTINGS_URL";
+    private static final String EXTRA_PROVIDER_PACKAGE = "PROVIDER_PACKAGE";
+
+    private static final String CATEGORY_LAUNCH_WEBAPK_SITE_SETTINGS =
+            "androidx.browser.trusted.category.LaunchWebApkSiteSettings";
+
+    private static final String ACTION_CUSTOM_TABS_CONNECTION =
+            "android.support.customtabs.action.CustomTabsService";
+
+    private String mProviderPackage;
+
+    /**
+     * The url of the page for which the settings will be shown. Must be provided as an intent
+     * extra to {@link ManageDataLauncherActivity}.
+     */
+    private Uri mUrl;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mProviderPackage = getIntent().getStringExtra(EXTRA_PROVIDER_PACKAGE);
+        mUrl = Uri.parse(getIntent().getStringExtra(EXTRA_SITE_SETTINGS_URL));
+
+        if (!supportsLaunchSettings(this, mProviderPackage)) {
+            handleNoSupportForLaunchSettings();
+            return;
+        }
+        setContentView(createLoadingView());
+        launchSettings();
+    }
+
+    /**
+     * Returns a view with a loading spinner.
+     */
+    private View createLoadingView() {
+        ProgressBar progressBar = new ProgressBar(this);
+        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT);
+        params.gravity = Gravity.CENTER;
+        progressBar.setLayoutParams(params);
+        FrameLayout layout = new FrameLayout(this);
+        layout.addView(progressBar);
+        return layout;
+    }
+
+    /**
+     * Called if a provider doesn't support the launch settings feature. Shows a toast telling the
+     * user how to fix it, then finishes the activity.
+     */
+    private void handleNoSupportForLaunchSettings() {
+        String appName;
+        try {
+            ApplicationInfo info = getPackageManager().getApplicationInfo(mProviderPackage, 0);
+            appName = getPackageManager().getApplicationLabel(info).toString();
+        } catch (PackageManager.NameNotFoundException e) {
+            appName = mProviderPackage;
+        }
+
+        Toast.makeText(this, getString(R.string.no_support_for_launch_settings, appName),
+                     Toast.LENGTH_LONG)
+                .show();
+        finish();
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        finish();
+    }
+
+    private void launchSettings() {
+        Intent intent = new Intent();
+        intent.setAction(ACTION_SITE_SETTINGS);
+        intent.setPackage(mProviderPackage);
+        intent.setData(mUrl);
+        intent.putExtra(WebApkConstants.EXTRA_IS_WEBAPK, true);
+
+        try {
+            startActivityForResult(intent, 0 /* requestCode */);
+            finish();
+        } catch (ActivityNotFoundException e) {
+            handleNoSupportForLaunchSettings();
+        }
+    }
+
+    private static boolean supportsLaunchSettings(Context context, String providerPackage) {
+        Intent intent = new Intent(ACTION_CUSTOM_TABS_CONNECTION);
+        intent.addCategory(CATEGORY_LAUNCH_WEBAPK_SITE_SETTINGS);
+        intent.setPackage(providerPackage);
+        List<ResolveInfo> services = context.getPackageManager().queryIntentServices(
+                intent, PackageManager.GET_RESOLVED_FILTER);
+        return services.size() > 0;
+    }
+
+    /**
+     * Returns the {@link ShortcutInfo} for a dynamic shortcut into site settings,
+     * provided that {@link ManageDataLauncherActivity} is present in the manifest
+     * and an Intent for managing site settings is available.
+     *
+     * Otherwise returns null if {@link ManageDataLauncherActivity} is not launchable
+     * or if shortcuts are not supported by the Android SDK version.
+     *
+     * The shortcut returned does not specify an activity. Thus when the shortcut is added,
+     * the app's main activity will be used by default. This activity needs to define the
+     * MAIN action and LAUNCHER category in order to attach the shortcut.
+     */
+    @TargetApi(Build.VERSION_CODES.N_MR1)
+    private static ShortcutInfo createSiteSettingsShortcutInfo(
+            Context context, String url, String providerPackage) {
+        Intent siteSettingsIntent = new Intent(context, ManageDataLauncherActivity.class);
+        // Intent needs to have an action set, we can set an arbitrary action.
+        siteSettingsIntent.setAction(ACTION_SITE_SETTINGS);
+        siteSettingsIntent.putExtra(EXTRA_SITE_SETTINGS_URL, url);
+        siteSettingsIntent.putExtra(EXTRA_PROVIDER_PACKAGE, providerPackage);
+
+        return new ShortcutInfo.Builder(context, SITE_SETTINGS_SHORTCUT_ID)
+                .setShortLabel(context.getString(R.string.site_settings_short_label))
+                .setLongLabel(context.getString(R.string.site_settings_long_label))
+                .setIcon(Icon.createWithResource(context, R.drawable.ic_site_settings))
+                .setIntent(siteSettingsIntent)
+                .build();
+    }
+
+    /**
+     * Adds dynamic shortcut to site settings if the provider and android version support it.
+     *
+     * Removes previously added site settings shortcut if it is no longer supported, e.g. the user
+     * changed their default browser.
+     */
+    public static void updateSiteSettingsShortcut(
+            Context context, HostBrowserLauncherParams params) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1) return;
+
+        ShortcutManager shortcutManager = context.getSystemService(ShortcutManager.class);
+
+        // Remove potentially existing shortcut if package does not support shortcuts.
+        if (!supportsLaunchSettings(context, params.getHostBrowserPackageName())) {
+            shortcutManager.removeDynamicShortcuts(Collections.singletonList(
+                    ManageDataLauncherActivity.SITE_SETTINGS_SHORTCUT_ID));
+            return;
+        }
+
+        ShortcutInfo shortcut = createSiteSettingsShortcutInfo(
+                context, params.getStartUrl(), params.getHostBrowserPackageName());
+        shortcutManager.addDynamicShortcuts(Collections.singletonList(shortcut));
+    }
+}

chrome/android/webapk/strings/android_webapk_strings.grd

@@ -167,6 +167,15 @@
   </translations>
   <release allow_pseudo="false" seq="1">
     <messages fallback_to_english="true">
+      <message name="IDS_SITE_SETTINGS_LONG_LABEL" desc="Site settings Android app shortcut title to display on devices with larger screens. (ideally less than 25 characters)">
+        Site settings
+      </message>
+      <message name="IDS_SITE_SETTINGS_SHORT_LABEL" desc="Site settings Android app shortcut title. (ideally less than 10 characters)">
+        Site settings
+      </message>
+      <message name="IDS_NO_SUPPORT_FOR_LAUNCH_SETTINGS" desc="Text to show in a toast when a user clicks on a site settings shortcut but that feature is not supported by the browser.">
+        To open site settings, update or reinstall <ph name="BROWSER_NAME">%1$s<ex>Chrome</ex></ph>
+      </message>
       <!-- Select host browser dialog -->
       <message name="IDS_CHOOSE_HOST_BROWSER_DIALOG_TITLE" desc="Title for the host browser picker dialog, which is used to ask users to pick a browser to launch the installed WebAPK.">
         <ph name="APP_NAME">%1$s<ex>Progressive Web Apps</ex></ph> requires a web browser

chrome/android/webapk/strings/android_webapk_strings_grd/IDS_NO_SUPPORT_FOR_LAUNCH_SETTINGS.png.sha1

+99afdcfb54eadd12dad55079e782f00e904764f0
\ No newline at end of file

chrome/android/webapk/strings/android_webapk_strings_grd/IDS_SITE_SETTINGS_LONG_LABEL.png.sha1

+f42d794cf577db2d062ce76e412b52351cfec17f
\ No newline at end of file

chrome/android/webapk/strings/android_webapk_strings_grd/IDS_SITE_SETTINGS_SHORT_LABEL.png.sha1

+f42d794cf577db2d062ce76e412b52351cfec17f
\ No newline at end of file

components/webapk/android/libs/client/src/org/chromium/components/webapk/lib/client/WebApkValidator.java

@@ -177,10 +177,16 @@ public class WebApkValidator {
      */
     @SuppressLint("PackageManagerGetSignatures")
     public static boolean isValidWebApk(Context context, String webappPackageName) {
+        if (sOverrideValidationForTesting) {
+            if (DEBUG) {
+                Log.d(TAG, "WebApk validation is disabled for testing.");
+            }
+            return true;
+        }
         if (sExpectedSignature == null || sCommentSignedPublicKeyBytes == null) {
             Log.wtf(TAG,
-                    "WebApk validation failure - expected signature not set."
-                            + "missing call to WebApkValidator.initWithBrowserHostSignature");
+                    "WebApk validation failure - expected signature not set - "
+                            + "missing call to WebApkValidator.init");
             return false;
         }
         PackageInfo packageInfo;
@@ -197,12 +203,6 @@ public class WebApkValidator {
         if (isNotWebApkQuick(packageInfo)) {
             return false;
         }
-        if (sOverrideValidationForTesting) {
-            if (DEBUG) {
-                Log.d(TAG, "Ok! Looks like a WebApk (has start url) and validation is disabled.");
-            }
-            return true;
-        }
         if (verifyV1WebApk(packageInfo, webappPackageName)) {
             return true;
         }