Implement deleteItem and openItem on OfflinePageDownloadBridge.

components/offline_pages/downloads/download_ui_adapter.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_OFFLINE_PAGE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_
 #define COMPONENTS_OFFLINE_PAGE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 52 matching lines @@
   // itself as an observer.
   // When the last observer si removed, cached list of items is destroyed and
   // next time the initial loading will take longer.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   const DownloadUIItemsMap& GetAllItems() const;
   // May return nullptr.
   const DownloadUIItem* GetItem(const std::string& guid) const;
 
+  // Commands from UI. Start async operations, result is observable
+  // via Observer or directly by the user (as in 'open').
+  void DeleteItem(const std::string& guid);
+  std::string GetOfflineUrlByGuid(guid);

[fgorski, 2016/08/09 04:00:51]

this is where it does not compile.

[Dmitry Titov, 2016/08/12 04:01:39]

Done.

+

[fgorski, 2016/08/09 04:00:51]

nit: remove empty line

[Dmitry Titov, 2016/08/12 04:01:39]

Done.

+
   // OfflinePageModel::Observer
   void OfflinePageModelLoaded(OfflinePageModel* model) override;
   void OfflinePageModelChanged(OfflinePageModel* model) override;
   void OfflinePageDeleted(int64_t offline_id,
                           const ClientId& client_id) override;
 
  private:
   void LoadCache();
   void ClearCache();
 
   // Task callbacks.
   void OnOfflinePagesLoaded(const MultipleOfflinePageItemResult& pages);
   void NotifyItemsLoaded(Observer* observer);
   void OnOfflinePagesChanged(const MultipleOfflinePageItemResult& pages);
+  void OnDeleteItemByGuid(
+    const MultipleOfflinePageItemResult& pages, const std::string& guid);
+  void OnDeletePagesDone(bool success);
+
+  OfflinePageItem* FindPageByGuid(
+    const MultipleOfflinePageItemResult& pages, const std::string& guid);
   bool IsVisibleInUI(const OfflinePageItem& page);
 
   // Always valid, this class is a member of the model.
   OfflinePageModel* model_;
 
   bool is_loaded_;
 
   // The cache of UI items.
   DownloadUIItemsMap items_;
 
   // The observers.
   base::ObserverList<Observer> observers_;
 
   base::WeakPtrFactory<DownloadUIAdapter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadUIAdapter);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_