[NTP Snippets] Hook up background fetching scheduler to UserClassifier

components/ntp_snippets/remote/ntp_snippets_service.h

 // Copyright 2015 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_REMOTE_NTP_SNIPPETS_SERVICE_H_
 #define COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_SERVICE_H_
 
 #include <cstddef>
 #include <map>
 #include <memory>
@@ skipping 29 matching lines @@
 class ImageFetcher;
 }  // namespace image_fetcher
 
 namespace suggestions {
 class SuggestionsProfile;
 }  // namespace suggestions
 
 namespace ntp_snippets {
 
 class NTPSnippetsDatabase;
+class UserClassifier;
 
 // Retrieves fresh content data (articles) from the server, stores them and
 // provides them as content suggestions.
 // This class is final because it does things in its constructor which make it
 // unsafe to derive from it.
 // TODO(treib): Introduce two-phase initialization and make the class not final?
 // TODO(pke): Rename this service to ArticleSuggestionsProvider and move to
 // a subdirectory.
 // TODO(jkrcal): this class grows really, really large. The fact that
 // NTPSnippetService also implements ImageFetcherDelegate adds unnecessary
 // complexity (and after all the Service is conceptually not an
 // ImagerFetcherDeletage ;-)). Instead, the cleaner solution would  be to define
 // a CachedImageFetcher class that handles the caching aspects and looks like an
 // image fetcher to the NTPSnippetService.
 class NTPSnippetsService final : public ContentSuggestionsProvider,
                                  public image_fetcher::ImageFetcherDelegate {
  public:
   // |application_language_code| should be a ISO 639-1 compliant string, e.g.
   // 'en' or 'en-US'. Note that this code should only specify the language, not
   // the locale, so 'en_US' (English language with US locale) and 'en-GB_US'
   // (British English person in the US) are not language codes.
   NTPSnippetsService(Observer* observer,
                      CategoryFactory* category_factory,
                      PrefService* pref_service,
                      suggestions::SuggestionsService* suggestions_service,
                      const std::string& application_language_code,
+                     const UserClassifier* user_classifier,
                      NTPSnippetsScheduler* scheduler,
                      std::unique_ptr<NTPSnippetsFetcher> snippets_fetcher,
                      std::unique_ptr<image_fetcher::ImageFetcher> image_fetcher,
                      std::unique_ptr<image_fetcher::ImageDecoder> image_decoder,
                      std::unique_ptr<NTPSnippetsDatabase> database,
                      std::unique_ptr<NTPSnippetsStatusService> status_service);
 
   ~NTPSnippetsService() override;
 
   static void RegisterProfilePrefs(PrefRegistrySimple* registry);
@@ skipping 243 matching lines @@
     CategoryContent();
     CategoryContent(CategoryContent&&);
     ~CategoryContent();
     CategoryContent& operator=(CategoryContent&&);
   };
   std::map<Category, CategoryContent, Category::CompareByID> categories_;
 
   // The ISO 639-1 code of the language used by the application.
   const std::string application_language_code_;
 
+  // Classifier that tells us how active the user is. Not owned.
+  const UserClassifier* user_classifier_;
+
   // Scheduler for fetching snippets. Not owned.
   NTPSnippetsScheduler* scheduler_;
 
   // The subscription to the SuggestionsService. When the suggestions change,
   // SuggestionsService will call |OnSuggestionsChanged|, which triggers an
   // update to the set of snippets.
   using SuggestionsSubscription =
       suggestions::SuggestionsService::ResponseCallbackList::Subscription;
   std::unique_ptr<SuggestionsSubscription> suggestions_service_subscription_;
 
@@ skipping 20 matching lines @@
 
   // Request throttler for limiting requests to thumbnail images.
   RequestThrottler thumbnail_requests_throttler_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPSnippetsService);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_REMOTE_NTP_SNIPPETS_SERVICE_H_