Fix the Download Notifications for Offline Pages to indicate bytes loaded.

components/offline_pages/core/downloads/download_notifying_observer.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_NOTIFYING_OBSERVER_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_DOWNLOAD_NOTIFYING_OBSERVER_H_
 
 #include <memory>
 
 #include "base/guid.h"
 #include "base/macros.h"
 #include "components/offline_pages/core/background/request_coordinator.h"
 #include "components/offline_pages/core/client_policy_controller.h"
+#include "components/offline_pages/core/downloads/download_ui_item.h"
 
 namespace offline_pages {
 
 struct ClientId;
 struct OfflinePageDownloadNotifier;
 class ClientPolicyController;
 class SavePageRequest;
 
 // Class observing the save page requests and issuing corresponding user
 // notifications as requests are added or updated.
 class DownloadNotifyingObserver : public RequestCoordinator::Observer,
                                   public base::SupportsUserData::Data {
  public:
   ~DownloadNotifyingObserver() override;
 
   static DownloadNotifyingObserver* GetFromRequestCoordinator(
       RequestCoordinator* request_coordinator);
   static void CreateAndStartObserving(
       RequestCoordinator* request_coordinator,
       std::unique_ptr<OfflinePageDownloadNotifier> notifier);
 
   // RequestCoordinator::Observer implementation:
   void OnAdded(const SavePageRequest& request) override;
   void OnChanged(const SavePageRequest& request) override;
   void OnCompleted(
       const SavePageRequest& request,
       RequestCoordinator::BackgroundSavePageResult status) override;
+  void OnNetworkProgress(const SavePageRequest& request,
+                         int64_t received_bytes) override;
 
  private:
   friend class DownloadNotifyingObserverTest;
 
   DownloadNotifyingObserver(
       std::unique_ptr<OfflinePageDownloadNotifier> notifier,
       ClientPolicyController* policy_controller);
 
   bool IsVisibleInUI(const ClientId& id);
 
   void NotifyRequestStateChange(const SavePageRequest& request);
 
   // Used to issue notifications related to save page requests.
   std::unique_ptr<OfflinePageDownloadNotifier> notifier_;
   // Used to determine policy-related permissions. Not owned.
   ClientPolicyController* policy_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadNotifyingObserver);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_DOWNLOAD_NOTIFYING_OBSERVER_H_