Offline Pages: Replace Observer::OfflinePageModelChanged with OfflinePageAdded.

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 a8835fe039fbc31234c234dfb3fd5c2ee33c985f..fd2c291b74c707bea707420cc83e294b69b5442a 100644
--- a/components/offline_pages/downloads/download_ui_adapter.h
+++ b/components/offline_pages/downloads/download_ui_adapter.h
@@ -79,8 +79,9 @@ class DownloadUIAdapter : public OfflinePageModel::Observer,
   int64_t GetOfflineIdByGuid(const std::string& guid) const;
 
   // OfflinePageModel::Observer
-  void OfflinePageModelLoaded(OfflinePageModel* model) override;
-  void OfflinePageModelChanged(OfflinePageModel* model) override;
+  void OfflinePageAdded(OfflinePageModel* model,
+                        SavePageResult result,
+                        const OfflinePageItem* added) override;
   void OfflinePageDeleted(int64_t offline_id,
                           const ClientId& client_id) override;
 
@@ -111,7 +112,6 @@ class DownloadUIAdapter : public OfflinePageModel::Observer,
   // Task callbacks.
   void OnOfflinePagesLoaded(const MultipleOfflinePageItemResult& pages);
   void NotifyItemsLoaded(Observer* observer);
-  void OnOfflinePagesChanged(const MultipleOfflinePageItemResult& pages);
   void OnDeletePagesDone(DeletePageResult result);
 
   // Always valid, this class is a member of the model.