[Offline Pages] Remove load state from public OfflinePageModel API.

components/offline_pages/core/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_PAGES_CORE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 61 matching lines @@
   std::vector<const DownloadUIItem*> GetAllItems() const;
   // May return nullptr if item with specified guid does not exist.
   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);
   int64_t GetOfflineIdByGuid(const std::string& guid) const;
 
   // OfflinePageModel::Observer
-  void OfflinePageModelLoaded(OfflinePageModel* model) override;
   void OfflinePageAdded(OfflinePageModel* model,
                         const OfflinePageItem& added_page) override;
   void OfflinePageDeleted(int64_t offline_id,
                           const ClientId& client_id) override;
 
  private:
   enum class State { NOT_LOADED, LOADING, LOADED };
 
   struct ItemInfo {
     explicit ItemInfo(const OfflinePageItem& page);
@@ skipping 30 matching lines @@
   int observers_count_;
 
   base::WeakPtrFactory<DownloadUIAdapter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadUIAdapter);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGE_DOWNLOADS_DOWNLOAD_UI_ADAPTER_H_