Fall back to shortcut A2HS when Phonesky is out of date or unavailable.

chrome/browser/android/webapps/add_to_homescreen_manager.cc

 // Copyright 2015 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 "chrome/browser/android/webapps/add_to_homescreen_manager.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/guid.h"
 #include "base/location.h"
@@ skipping 58 matching lines @@
 
   if (data_fetcher_->is_ready()) {
     // If the fetcher isn't ready yet, the shortcut will be added when it is
     // via OnDataAvailable();
     AddShortcut(data_fetcher_->shortcut_info(), data_fetcher_->primary_icon());
   }
 }
 
 void AddToHomescreenManager::Start(content::WebContents* web_contents) {
   bool check_webapk_compatible = false;
-  if (ChromeWebApkHost::AreWebApkEnabled() &&
+  if (ChromeWebApkHost::CanInstallWebApk() &&
       InstallableManager::IsContentSecure(web_contents)) {
     check_webapk_compatible = true;
   } else {
     ShowDialog();
   }
 
   data_fetcher_ = new AddToHomescreenDataFetcher(
       web_contents, ShortcutHelper::GetIdealHomescreenIconSizeInPx(),
       ShortcutHelper::GetMinimumHomescreenIconSizeInPx(),
       ShortcutHelper::GetIdealSplashImageSizeInPx(),
@@ skipping 109 matching lines @@
 
 SkBitmap AddToHomescreenManager::FinalizeLauncherIconInBackground(
     const SkBitmap& bitmap,
     const GURL& url,
     bool* is_generated) {
   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 
   return ShortcutHelper::FinalizeLauncherIconInBackground(bitmap, url,
                                                           is_generated);
 }