Pass in extra parameters to WebApkBuilder#buildWebApkAsync()

chrome/browser/banners/app_banner_data_fetcher_desktop.h

 // 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.
 
 #ifndef CHROME_BROWSER_BANNERS_APP_BANNER_DATA_FETCHER_DESKTOP_H_
 #define CHROME_BROWSER_BANNERS_APP_BANNER_DATA_FETCHER_DESKTOP_H_
 
 #include "base/macros.h"
 #include "chrome/browser/banners/app_banner_data_fetcher.h"
 
@@ skipping 20 matching lines @@
 
  protected:
   ~AppBannerDataFetcherDesktop() override;
 
  private:
   // AppBannerDataFetcher override.
   bool IsWebAppInstalled(content::BrowserContext* browser_context,
                          const GURL& start_url) override;
 
   // AppBannerDataFetcher override.
-  void ShowBanner(const SkBitmap* icon,
+  void ShowBanner(const GURL& icon_url,
+                  const SkBitmap* icon,
                   const base::string16& title,
                   const std::string& referrer) override;
 
   std::unique_ptr<extensions::BookmarkAppHelper> bookmark_app_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerDataFetcherDesktop);
 };
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_BANNERS_APP_BANNER_DATA_FETCHER_DESKTOP_H_