Measure usage metrics to prepare for adaptive fetching rates in M55

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 625200990821bcabd56ca23932fa735988955a24..58aa53f77689d1c4d60e61d883470fc4b5c2f6c5 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -206,8 +206,9 @@ class ContentSuggestionsServiceTest : public testing::Test {
   void CreateContentSuggestionsService(
       ContentSuggestionsService::State enabled) {
     ASSERT_FALSE(service_);
-    service_.reset(
-        new ContentSuggestionsService(enabled, /*history_service=*/nullptr));
+    service_.reset(new ContentSuggestionsService(enabled,
+                                                 nullptr /* history_service */,
+                                                 nullptr /* pref_service */));
   }
 
   ContentSuggestionsService* service() { return service_.get(); }