Add UMA for the content suggestions settings

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 498809a6f587c9be76f82830911cefdcf51339d6..9bd9fe94a859368ab49225469cf65e3c3ffe100b 100644
--- a/components/ntp_snippets/content_suggestions_service_unittest.cc
+++ b/components/ntp_snippets/content_suggestions_service_unittest.cc
@@ -23,6 +23,7 @@
 #include "components/ntp_snippets/content_suggestion.h"
 #include "components/ntp_snippets/content_suggestions_provider.h"
 #include "components/ntp_snippets/mock_content_suggestions_provider.h"
+#include "components/ntp_snippets/remote/remote_suggestions_provider_impl.h"
 #include "components/ntp_snippets/user_classifier.h"
 #include "components/prefs/testing_pref_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -141,6 +142,8 @@ class ContentSuggestionsServiceTest : public testing::Test {
  protected:
   void RegisterPrefs() {
     ContentSuggestionsService::RegisterProfilePrefs(pref_service_->registry());
+    RemoteSuggestionsProviderImpl::RegisterProfilePrefs(
+        pref_service_->registry());
     UserClassifier::RegisterProfilePrefs(pref_service_->registry());
   }