[Remote suggestions] Refactor the scheduler

ios/chrome/browser/prefs/browser_prefs.mm

Index: ios/chrome/browser/prefs/browser_prefs.mm
diff --git a/ios/chrome/browser/prefs/browser_prefs.mm b/ios/chrome/browser/prefs/browser_prefs.mm
index 685758666abca4c8fc74307943e45f80183eb840..34466e89fd6eab4bf72dae9671fddfa844bd46d0 100644
--- a/ios/chrome/browser/prefs/browser_prefs.mm
+++ b/ios/chrome/browser/prefs/browser_prefs.mm
@@ -17,8 +17,8 @@
 #include "components/ntp_snippets/category_rankers/click_based_category_ranker.h"
 #include "components/ntp_snippets/content_suggestions_service.h"
 #include "components/ntp_snippets/remote/remote_suggestions_provider_impl.h"
+#include "components/ntp_snippets/remote/remote_suggestions_scheduler_impl.h"
 #include "components/ntp_snippets/remote/request_throttler.h"
-#include "components/ntp_snippets/remote/scheduling_remote_suggestions_provider.h"
 #include "components/ntp_snippets/user_classifier.h"
 #include "components/ntp_tiles/most_visited_sites.h"
 #include "components/ntp_tiles/popular_sites_impl.h"
@@ -101,9 +101,8 @@ void RegisterBrowserStatePrefs(user_prefs::PrefRegistrySyncable* registry) {
   ntp_snippets::ClickBasedCategoryRanker::RegisterProfilePrefs(registry);
   ntp_snippets::ContentSuggestionsService::RegisterProfilePrefs(registry);
   ntp_snippets::RemoteSuggestionsProviderImpl::RegisterProfilePrefs(registry);
+  ntp_snippets::RemoteSuggestionsSchedulerImpl::RegisterProfilePrefs(registry);
   ntp_snippets::RequestThrottler::RegisterProfilePrefs(registry);
-  ntp_snippets::SchedulingRemoteSuggestionsProvider::RegisterProfilePrefs(
-      registry);
   ntp_snippets::UserClassifier::RegisterProfilePrefs(registry);
   ntp_tiles::MostVisitedSites::RegisterProfilePrefs(registry);
   ntp_tiles::PopularSitesImpl::RegisterProfilePrefs(registry);