[NTP::PhysicalWeb] Implement Fetch for "More" button.

components/ntp_snippets/physical_web_pages/physical_web_page_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_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 42 matching lines @@
 
  private:
   friend class PhysicalWebPageSuggestionsProviderTest;
 
   // Updates the |category_status_| and notifies the |observer_|, if necessary.
   void NotifyStatusChanged(CategoryStatus new_status);
 
   // Manually requests all physical web pages and updates the suggestions.
   void FetchPhysicalWebPages();
 
+  // Returns at most |max_quantity| ContentSuggestions with IDs not in
+  // |excluded_ids| and sorted by distance (the closest first). The raw pages
+  // are obtained from Physical Web data source.
+  std::vector<ContentSuggestion> GetMostRecentPhysicalWebPagesWithFilter(
+      int max_quantity,

[Marc Treib, 2016/12/05 15:55:19]

max_count?

[vitaliii, 2016/12/06 07:30:21]

Done.

+      const std::set<std::string>& excluded_ids);
+
   // Converts an Physical Web page to a ContentSuggestion.
   ContentSuggestion ConvertPhysicalWebPage(
       const base::DictionaryValue& page) const;
 
   // PhysicalWebListener implementation.
   void OnFound(const std::string& url) override;
   void OnLost(const std::string& url) override;
   void OnDistanceChanged(const std::string& url,
                          double distance_estimate) override;
 
   CategoryStatus category_status_;
   const Category provided_category_;
   physical_web::PhysicalWebDataSource* physical_web_data_source_;
 
   DISALLOW_COPY_AND_ASSIGN(PhysicalWebPageSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_PHYSICAL_WEB_PAGES_PHYSICAL_WEB_PAGE_SUGGESTIONS_PROVIDER_H_