ntp_snippets: default to staging API on dev/canary

chrome/browser/ntp_snippets/content_suggestions_service_factory.cc

Index: chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
diff --git a/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc b/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
index 8070663d7e9b358158a9ada5b00ae0717bfb2f32..7c96659fc7ff7735c05dc6b968b94d97e39be09e 100644
--- a/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
+++ b/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
@@ -85,6 +85,7 @@ using ntp_snippets::BookmarkSuggestionsProvider;
 using ntp_snippets::CategoryRanker;
 using ntp_snippets::ContentSuggestionsService;
 using ntp_snippets::ForeignSessionsSuggestionsProvider;
+using ntp_snippets::GetFetchEndpoint;
 using ntp_snippets::PersistentScheduler;
 using ntp_snippets::RemoteSuggestionsDatabase;
 using ntp_snippets::RemoteSuggestionsFetcher;
@@ -189,6 +190,7 @@ void RegisterArticleProvider(SigninManagerBase* signin_manager,
   auto suggestions_fetcher = base::MakeUnique<RemoteSuggestionsFetcher>(
       signin_manager, token_service, request_context, pref_service,
       language_model, base::Bind(&safe_json::SafeJsonParser::Parse),
+      GetFetchEndpoint(chrome::GetChannel()),
       is_stable_channel ? google_apis::GetAPIKey()
                         : google_apis::GetNonStableAPIKey(),
       service->user_classifier());