Upstream: Do not show the add-to-homescreen/install-native-app infobar for WebAPKs

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkActivity.java

 // 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.
 
 package org.chromium.chrome.browser.webapps;
 
 import android.content.Intent;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.chrome.browser.ShortcutHelper;
+import org.chromium.chrome.browser.banners.AppBannerManager;
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.tab.TabDelegateFactory;
 import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.ui.base.PageTransition;
 import org.chromium.webapk.lib.client.WebApkServiceConnectionManager;
 
 /**
  * An Activity is designed for WebAPKs (native Android apps) and displays a webapp in a nearly
  * UI-less Chrome.
  */
 public class WebApkActivity extends WebappActivity {
     @Override
@@ skipping 15 matching lines @@
     }
 
     @Override
     protected void initializeSplashScreenWidgets(final int backgroundColor) {
         // TODO(hanxi): Removes this function and use {@link WebApkActivity}'s implementation
         // when WebAPKs are registered in WebappRegistry.
         initializeSplashScreenWidgets(backgroundColor, null);
     }
 
     @Override
+    protected TabDelegateFactory createTabDelegateFactory() {
+        return new WebappDelegateFactory(this) {
+            @Override
+            public AppBannerManager createAppBannerManager(Tab tab) {
+                // Do not show app banners for WebAPKs regardless of the current page URL.
+                // A WebAPK can display a page outside of its WebAPK scope if a page within the
+                // WebAPK scope navigates via JavaScript while the WebAPK is in the background.
+                return null;
+            }
+        };
+    }
+
     public void onStop() {
         super.onStop();
         String packageName = getWebappInfo().webApkPackageName();
         WebApkServiceConnectionManager.getInstance().disconnect(
                 ContextUtils.getApplicationContext(), packageName);
     }
 }