[NTP Snippets] Hook up background fetching scheduler to UserClassifier

components/ntp_snippets/remote/ntp_snippets_service.h

Index: components/ntp_snippets/remote/ntp_snippets_service.h
diff --git a/components/ntp_snippets/remote/ntp_snippets_service.h b/components/ntp_snippets/remote/ntp_snippets_service.h
index 43ed9960ffe7d0868b4f6d230768ba928271cb94..50fe9a89195570aec990b6742299ff5f22d22ce7 100644
--- a/components/ntp_snippets/remote/ntp_snippets_service.h
+++ b/components/ntp_snippets/remote/ntp_snippets_service.h
@@ -47,6 +47,7 @@ class SuggestionsProfile;
 namespace ntp_snippets {
 
 class NTPSnippetsDatabase;
+class UserClassifier;
 
 // Retrieves fresh content data (articles) from the server, stores them and
 // provides them as content suggestions.
@@ -73,6 +74,7 @@ class NTPSnippetsService final : public ContentSuggestionsProvider,
                      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,
@@ -336,6 +338,9 @@ class NTPSnippetsService final : public ContentSuggestionsProvider,
   // 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_;