Add "Request app banner" context menu in DevTools

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"
 
 namespace extensions {
 class BookmarkAppHelper;
 class Extension;
 }  // namespace extensions
 
 namespace banners {
 
 // Fetches data required to show a banner for the URL currently shown by the
 // WebContents. Extends the regular fetch to support desktop web apps.
 class AppBannerDataFetcherDesktop : public AppBannerDataFetcher {
  public:
   AppBannerDataFetcherDesktop(content::WebContents* web_contents,
                               base::WeakPtr<Delegate> weak_delegate,
                               int ideal_icon_size_in_dp,
-                              int minimum_icon_size_in_dp);
+                              int minimum_icon_size_in_dp,
+                              bool is_debug_mode);
 
   // Callback for finishing bookmark app creation
   void FinishCreateBookmarkApp(const extensions::Extension* extension,
                                const WebApplicationInfo& web_app_info);
 
  protected:
   ~AppBannerDataFetcherDesktop() override;
 
  private:
   // AppBannerDataFetcher override.
   bool IsWebAppInstalled(content::BrowserContext* browser_context,
                          const GURL& start_url) override;
 
   // AppBannerDataFetcher override.
   void ShowBanner(const SkBitmap* icon,
                   const base::string16& title,
                   const std::string& referrer) override;
 
   scoped_ptr<extensions::BookmarkAppHelper> bookmark_app_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerDataFetcherDesktop);
 };
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_BANNERS_APP_BANNER_DATA_FETCHER_DESKTOP_H_