Upstream: Create WebAPK when user selects "Add to Home screen"

chrome/android/java/src/org/chromium/chrome/browser/ChromeApplication.java

 // Copyright 2013 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;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ skipping 71 matching lines @@
 import org.chromium.chrome.browser.sync.GmsCoreSyncListener;
 import org.chromium.chrome.browser.sync.SyncController;
 import org.chromium.chrome.browser.tab.AuthenticatorNavigationInterceptor;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.TabModelSelector;
 import org.chromium.chrome.browser.tabmodel.document.ActivityDelegateImpl;
 import org.chromium.chrome.browser.tabmodel.document.DocumentTabModelSelector;
 import org.chromium.chrome.browser.tabmodel.document.StorageDelegate;
 import org.chromium.chrome.browser.tabmodel.document.TabDelegate;
 import org.chromium.chrome.browser.util.FeatureUtilities;
+import org.chromium.chrome.browser.webapps.WebApkBuilder;
 import org.chromium.content.app.ContentApplication;
 import org.chromium.content.browser.ChildProcessCreationParams;
 import org.chromium.content.browser.ChildProcessLauncher;
 import org.chromium.content.browser.ContentViewStatics;
 import org.chromium.content.browser.DownloadController;
 import org.chromium.content.common.ContentSwitches;
 import org.chromium.policy.AppRestrictionsProvider;
 import org.chromium.policy.CombinedPolicyProvider;
 import org.chromium.policy.CombinedPolicyProvider.PolicyChangeListener;
 import org.chromium.printing.PrintingController;
@@ skipping 252 matching lines @@
     }
 
     /**
      * Returns a new instance of VariationsSession.
      */
     public VariationsSession createVariationsSession() {
         return new VariationsSession();
     }
 
     /**
+     * Returns factory for building WebAPKs.
+     */
+    public WebApkBuilder createWebApkBuilder() {
+        return null;
+    }
+
+    /**
      * Return a {@link AuthenticatorNavigationInterceptor} for the given {@link Tab}.
      * This can be null if there are no applicable interceptor to be built.
      */
     @SuppressWarnings("unused")
     public AuthenticatorNavigationInterceptor createAuthenticatorNavigationInterceptor(Tab tab) {
         return null;
     }
 
     /**
      * Starts the application activity tracker.
@@ skipping 475 matching lines @@
      * Caches flags that are needed by Activities that launch before the native library is loaded
      * and stores them in SharedPreferences. Because this function is called during launch after the
      * library has loaded, they won't affect the next launch until Chrome is restarted.
      */
     private void cacheNativeFlags() {
         if (sIsFinishedCachingNativeFlags) return;
         FeatureUtilities.cacheNativeFlags(this);
         sIsFinishedCachingNativeFlags = true;
     }
 }