Fix the Download Notifications for Offline Pages to indicate bytes loaded.

chrome/browser/android/offline_pages/background_loader_offliner.h

Index: chrome/browser/android/offline_pages/background_loader_offliner.h
diff --git a/chrome/browser/android/offline_pages/background_loader_offliner.h b/chrome/browser/android/offline_pages/background_loader_offliner.h
index 04572def878bead66a5cb08972b27d7fceea86c9..f1b611bb33090756f14e41c69930d45bf2577cbd 100644
--- a/chrome/browser/android/offline_pages/background_loader_offliner.h
+++ b/chrome/browser/android/offline_pages/background_loader_offliner.h
@@ -36,7 +36,8 @@ class BackgroundLoaderOffliner : public Offliner,
 
   // Offliner implementation.
   bool LoadAndSave(const SavePageRequest& request,
-                   const CompletionCallback& callback) override;
+                   const CompletionCallback& completion_callback,
+                   const ProgressCallback& progress_callback) override;
   void Cancel(const CancelCallback& callback) override;
   bool HandleTimeout(const SavePageRequest& request) override;