Add "Request app banner" context menu in DevTools

chrome/browser/banners/app_banner_manager.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_MANAGER_H_
 #define CHROME_BROWSER_BANNERS_APP_BANNER_MANAGER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 21 matching lines @@
                          public AppBannerDataFetcher::Delegate {
  public:
   static void DisableSecureSchemeCheckForTesting();
 
   static void SetEngagementWeights(double direct_engagement,
                                    double indirect_engagement);
 
   // Returns whether or not the URLs match for everything except for the ref.
   static bool URLsAreForTheSamePage(const GURL& first, const GURL& second);
 
+  void TriggerAppBannerFetch(content::RenderFrameHost* render_frame_host,
+                             const GURL& validated_url,
+                             bool is_debug_mode);
+
   AppBannerManager();
   ~AppBannerManager() override;
 
  protected:
   explicit AppBannerManager(content::WebContents* web_contents);
 
   void ReplaceWebContents(content::WebContents* web_contents);
 
   // Creates an AppBannerDataFetcher, which constructs an app banner.
   virtual AppBannerDataFetcher* CreateAppBannerDataFetcher(
-      base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate) = 0;
+      base::WeakPtr<AppBannerDataFetcher::Delegate> weak_delegate,
+      bool is_debug_mode) = 0;
 
   // Return whether the AppBannerDataFetcher is active.
   bool IsFetcherActive();
 
   scoped_refptr<AppBannerDataFetcher> data_fetcher() { return data_fetcher_; }
 
  private:
   // WebContentsObserver overrides.
   void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
@@ skipping 20 matching lines @@
   // longer than the lifetime of this banner manager. The banner manager
   // might be gone when calls sent to the ServiceWorkerContext are completed.
   base::WeakPtrFactory<AppBannerManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppBannerManager);
 };  // class AppBannerManager
 
 }  // namespace banners
 
 #endif  // CHROME_BROWSER_BANNERS_APP_BANNER_MANAGER_H_