[Remote suggestions] Refactor the scheduler

components/ntp_snippets/content_suggestions_service_unittest.cc

Index: components/ntp_snippets/content_suggestions_service_unittest.cc
diff --git a/components/ntp_snippets/content_suggestions_service_unittest.cc b/components/ntp_snippets/content_suggestions_service_unittest.cc
index 6a8236ab4cd28b62a084eede40063002b10d9d75..31f74845f0bcbd622aa675b766b105851945db08 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/time/default_clock.h"
 #include "components/ntp_snippets/category_info.h"
 #include "components/ntp_snippets/category_rankers/constant_category_ranker.h"
 #include "components/ntp_snippets/category_rankers/fake_category_ranker.h"
@@ -146,9 +147,11 @@ class ContentSuggestionsServiceTest : public testing::Test {
   void CreateContentSuggestionsService(
       ContentSuggestionsService::State enabled) {
     ASSERT_FALSE(service_);
+
     service_ = base::MakeUnique<ContentSuggestionsService>(
         enabled, /*signin_manager=*/nullptr, /*history_service=*/nullptr,
-        pref_service_.get(), std::move(category_ranker_));
+        pref_service_.get(), std::move(category_ranker_),
+        /*user_classifier=*/nullptr, /*scheduler=*/nullptr);
   }
 
   void ResetService() {