Add "Request app banner" context menu in DevTools

chrome/browser/banners/app_banner_data_fetcher.h

Index: chrome/browser/banners/app_banner_data_fetcher.h
diff --git a/chrome/browser/banners/app_banner_data_fetcher.h b/chrome/browser/banners/app_banner_data_fetcher.h
index 24236a133527aef496855f8aa498cb0051ff45bd..467be394305a541d51d78d7c69da2f803f16e3a7 100644
--- a/chrome/browser/banners/app_banner_data_fetcher.h
+++ b/chrome/browser/banners/app_banner_data_fetcher.h
@@ -59,7 +59,8 @@ class AppBannerDataFetcher
   AppBannerDataFetcher(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);
 
   // Begins creating a banner for the URL being displayed by the Delegate's
   // WebContents.
@@ -170,7 +171,8 @@ class AppBannerDataFetcher
   // Returns whether the given Manifest is following the requirements to show
   // a web app banner.
   static bool IsManifestValidForWebApp(const content::Manifest& manifest,
-                                       content::WebContents* web_contents);
+                                       content::WebContents* web_contents,
+                                       bool is_debug_mode);
 
   const base::WeakPtr<Delegate> weak_delegate_;
   const int ideal_icon_size_in_dp_;
@@ -187,6 +189,7 @@ class AppBannerDataFetcher
   GURL validated_url_;
   base::string16 app_title_;
   content::Manifest web_app_data_;
+  const bool is_debug_mode_;
 
   friend class AppBannerDataFetcherUnitTest;
   friend class base::RefCounted<AppBannerDataFetcher>;