Fixes to enable indication of bytes downloaded for Offline Pages in Download Home.

chrome/browser/android/offline_pages/prerendering_offliner.cc

Index: chrome/browser/android/offline_pages/prerendering_offliner.cc
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner.cc b/chrome/browser/android/offline_pages/prerendering_offliner.cc
index e7ee1f979c2c3d4737f8d9404f6b5a77c4a483ce..5554393f564f538d62c5f84fe99c4fcc60789dc7 100644
--- a/chrome/browser/android/offline_pages/prerendering_offliner.cc
+++ b/chrome/browser/android/offline_pages/prerendering_offliner.cc
@@ -19,9 +19,6 @@
 #include "content/public/browser/web_contents.h"
 
 namespace offline_pages {
-namespace {
-const char kDownloadUIAdapterKey[] = "download-ui-adapter";
-}
 
 PrerenderingOffliner::PrerenderingOffliner(
     content::BrowserContext* browser_context,
@@ -41,10 +38,8 @@ void PrerenderingOffliner::OnNetworkProgress(const SavePageRequest& request,
                                              int64_t bytes) {
   if (!pending_request_)
     return;
-
-  DownloadUIAdapter* ui_adapter = static_cast<DownloadUIAdapter*>(
-      offline_page_model_->GetUserData(kDownloadUIAdapterKey));
-
+  DownloadUIAdapter* ui_adapter =
+      DownloadUIAdapter::FromOfflinePageModel(offline_page_model_);
   if (!ui_adapter)
     return;