Store original request URL in offline page metadata table

chrome/browser/android/offline_pages/prerendering_offliner.h

Index: chrome/browser/android/offline_pages/prerendering_offliner.h
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner.h b/chrome/browser/android/offline_pages/prerendering_offliner.h
index fd0f20a7966cad1f4ce71e6b9b493b7ae2b6756f..c41d78e6cb09122a6aab262939f2991e408ab9d0 100644
--- a/chrome/browser/android/offline_pages/prerendering_offliner.h
+++ b/chrome/browser/android/offline_pages/prerendering_offliner.h
@@ -49,12 +49,9 @@ class PrerenderingOffliner : public Offliner {
 
  protected:
   // Internal method for requesting OfflinePageModel to save page.  Exposed for
-  // unit testing.  |proposed_offline_id| will be used if non-zero.  If it is
-  // zero, a new, random, id will be generated instead.
+  // unit testing.
   // TODO(dougarnett): Consider making OfflinePageModel mockable instead.
-  virtual void SavePage(const GURL& url,
-                        const ClientId& client_id,
-                        int64_t proposed_offline_id,
+  virtual void SavePage(const OfflinePageModel::SavePageInfo& save_page_info,
                         std::unique_ptr<OfflinePageArchiver> archiver,
                         const SavePageCallback& save_callback);