Offline Pages: Replace Observer::OfflinePageModelChanged with OfflinePageAdded.

chrome/browser/ntp_snippets/download_suggestions_provider.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_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 #define CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 65 matching lines @@
 
  private:
   friend class DownloadSuggestionsProviderTest;
 
   void GetPagesMatchingQueryCallbackForGetDismissedSuggestions(
       const ntp_snippets::DismissedSuggestionsCallback& callback,
       const std::vector<offline_pages::OfflinePageItem>& offline_pages) const;
 
   // OfflinePageModel::Observer implementation.
   void OfflinePageModelLoaded(offline_pages::OfflinePageModel* model) override;
-  void OfflinePageModelChanged(offline_pages::OfflinePageModel* model) override;
+  void OfflinePageAdded(
+      offline_pages::OfflinePageModel* model,
+      const offline_pages::OfflinePageItem& added_page) override;
   void OfflinePageDeleted(int64_t offline_id,
                           const offline_pages::ClientId& client_id) override;
 
   // content::DownloadManager::Observer implementation.
   void OnDownloadCreated(content::DownloadManager* manager,
                          content::DownloadItem* item) override;
   void ManagerGoingDown(content::DownloadManager* manager) override;
 
   // content::DownloadItem::Observer implementation.
   void OnDownloadUpdated(content::DownloadItem* item) override;
@@ skipping 118 matching lines @@
   // Whether the Download Manager UI is enabled, in which case the More button
   // for the Downloads section can redirect there.
   const bool download_manager_ui_enabled_;
 
   base::WeakPtrFactory<DownloadSuggestionsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadSuggestionsProvider);
 };
 
 #endif  // CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_