[NTP Snippets] Refactor background scheduling for remote suggestions

components/ntp_snippets/content_suggestions_service.cc

Index: components/ntp_snippets/content_suggestions_service.cc
diff --git a/components/ntp_snippets/content_suggestions_service.cc b/components/ntp_snippets/content_suggestions_service.cc
index 92ef4b46aea07264201b3124a229e25d8fc8cab1..17dddd856a30c53a2422dd486f1dd6bd02bfabba 100644
--- a/components/ntp_snippets/content_suggestions_service.cc
+++ b/components/ntp_snippets/content_suggestions_service.cc
@@ -29,7 +29,7 @@ ContentSuggestionsService::ContentSuggestionsService(
     : state_(state),
       signin_observer_(this),
       history_service_observer_(this),
-      ntp_snippets_service_(nullptr),
+      remote_suggestions_provider_(nullptr),
       pref_service_(pref_service),
       user_classifier_(pref_service) {
   // Can be null in tests.
@@ -47,7 +47,7 @@ ContentSuggestionsService::ContentSuggestionsService(
 ContentSuggestionsService::~ContentSuggestionsService() = default;
 
 void ContentSuggestionsService::Shutdown() {
-  ntp_snippets_service_ = nullptr;
+  remote_suggestions_provider_ = nullptr;
   suggestions_by_category_.clear();
   providers_by_category_.clear();
   categories_.clear();