[Offline Pages] Check for the appropriate namespace when showing notifications.

components/offline_pages/downloads/download_ui_adapter.h

Index: components/offline_pages/downloads/download_ui_adapter.h
diff --git a/components/offline_pages/downloads/download_ui_adapter.h b/components/offline_pages/downloads/download_ui_adapter.h
index a8ea99be966218913d20a2441b1f309a78e3f666..20c9e3ea9a382950935b9dbfa68c90f767e3db60 100644
--- a/components/offline_pages/downloads/download_ui_adapter.h
+++ b/components/offline_pages/downloads/download_ui_adapter.h
@@ -56,6 +56,10 @@ class DownloadUIAdapter : public OfflinePageModel::Observer,
   static DownloadUIAdapter* FromOfflinePageModel(
       OfflinePageModel* offline_page_model);
 
+  // Checks a client ID for proper namespace and ID format to be shown in the
+  // Downloads Home UI.
+  static bool IsVisibleInUI(const ClientId& page);
+
   // This adapter is potentially shared by UI elements, each of which adds
   // itself as an observer.
   // When the last observer si removed, cached list of items is destroyed and
@@ -111,8 +115,6 @@ class DownloadUIAdapter : public OfflinePageModel::Observer,
   void OnOfflinePagesChanged(const MultipleOfflinePageItemResult& pages);
   void OnDeletePagesDone(DeletePageResult result);
 
-  bool IsVisibleInUI(const ClientId& page);
-
   // Always valid, this class is a member of the model.
   OfflinePageModel* model_;