[Android Downloads] Long-press menu item "Download Link" should delegate job to OfflinePages backen…

chrome/browser/android/offline_pages/offline_page_utils.h

Index: chrome/browser/android/offline_pages/offline_page_utils.h
diff --git a/chrome/browser/android/offline_pages/offline_page_utils.h b/chrome/browser/android/offline_pages/offline_page_utils.h
index 9e7e2924b46926b774738f95d1baa21cf058d67b..60f941797fd049f3652b298ba405948957fc9aeb 100644
--- a/chrome/browser/android/offline_pages/offline_page_utils.h
+++ b/chrome/browser/android/offline_pages/offline_page_utils.h
@@ -88,6 +88,9 @@ class OfflinePageUtils {
       const PagesExistCallback& callback);
 
   static bool EqualsIgnoringFragment(const GURL& lhs, const GURL& rhs);
+
+  static void StartOfflinePageDownload(content::BrowserContext* context,
+                                       const GURL& url);
 };
 
 }  // namespace offline_pages