When an offline page is saved to homescreen, use the online URL.

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h

Index: chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
diff --git a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
index 173b45fca46414b41e825734e18081bd35dbe24c..58a3af66dca4054bb54922f681bc24a4be35cd39 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
+++ b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
@@ -100,6 +100,11 @@ class AddToHomescreenDataFetcher
   // Notifies the observer that the shortcut data is all available.
   void NotifyObserver(const SkBitmap& icon, bool is_generated);
 
+  // Looks up the original, online URL of the site requested.  The URL from the
+  // WebContents may be an offline page or a distilled article which is not
+  // appropriate for a home screen shortcut.
+  GURL GetShortcutUrl(const GURL& original_url);
+
   Observer* weak_observer_;
 
   bool is_waiting_for_web_application_info_;