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 59d721dea1683fac274a0b76566dffc1d1dbfb95..3957dd3723210a5cbec0d0a30f3e88b38acebe2f 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -205,8 +205,9 @@ 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(); }