Offline Pages: Replace Observer::OfflinePageModelChanged with OfflinePageAdded.

components/ntp_snippets/offline_pages/recent_tab_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 COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_RECENT_TAB_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_RECENT_TAB_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 54 matching lines @@
 
  private:
   friend class RecentTabSuggestionsProviderTest;
 
   void GetPagesMatchingQueryCallbackForGetDismissedSuggestions(
       const 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;
 
   void GetPagesMatchingQueryCallbackForFetchRecentTabs(
       const std::vector<offline_pages::OfflinePageItem>& offline_pages);
 
   // Updates the |category_status_| of the |provided_category_| and notifies the
   // |observer_|, if necessary.
   void NotifyStatusChanged(CategoryStatus new_status);
 
@@ skipping 30 matching lines @@
   PrefService* pref_service_;
 
   base::WeakPtrFactory<RecentTabSuggestionsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RecentTabSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_RECENT_TAB_SUGGESTIONS_PROVIDER_H_