[Offline pages] Update background loader offliner to return error when

chrome/browser/android/offline_pages/background_loader_offliner.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_
 
 #include <memory>
 
 #include "base/android/application_status_listener.h"
@@ skipping 23 matching lines @@
                            OfflinePageModel* offline_page_model);
   ~BackgroundLoaderOffliner() override;
 
   // Offliner implementation.
   bool LoadAndSave(const SavePageRequest& request,
                    const CompletionCallback& callback) override;
   void Cancel() override;
 
   // WebContentsObserver implementation.
   void DidStopLoading() override;
+  void RenderProcessGone(base::TerminationStatus status) override;
+  void WebContentsDestroyed() override;
 
  protected:
   // Called to reset internal loader and observer state.
   virtual void ResetState();
 
  private:
   friend class TestBackgroundLoaderOffliner;
 
   enum SaveState { NONE, SAVING, DELETE_AFTER_SAVE };
 
@@ skipping 19 matching lines @@
   bool is_low_end_device_;
   // Save state.
   SaveState save_state_;
 
   base::WeakPtrFactory<BackgroundLoaderOffliner> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BackgroundLoaderOffliner);
 };
 
 }  // namespace offline_pages
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_LOADER_OFFLINER_H_