Support action button to fetch more content suggestions

components/ntp_snippets/ntp_snippets_service.cc

Index: components/ntp_snippets/ntp_snippets_service.cc
diff --git a/components/ntp_snippets/ntp_snippets_service.cc b/components/ntp_snippets/ntp_snippets_service.cc
index 295acfbcd20c73bdc72e2300baca2449e4add84a..c83e2f11f19b8ce580b9aec8395be889584c78b5 100644
--- a/components/ntp_snippets/ntp_snippets_service.cc
+++ b/components/ntp_snippets/ntp_snippets_service.cc
@@ -284,7 +284,14 @@ CategoryStatus NTPSnippetsService::GetCategoryStatus(Category category) {
 CategoryInfo NTPSnippetsService::GetCategoryInfo(Category category) {
   return CategoryInfo(
       l10n_util::GetStringUTF16(IDS_NTP_ARTICLE_SUGGESTIONS_SECTION_HEADER),
-      ContentSuggestionsCardLayout::FULL_CARD);
+      ContentSuggestionsCardLayout::FULL_CARD, false);
+}
+
+void NTPSnippetsService::FetchMoreSuggestions(Category category) {
+  // TODO(pke): Move implementation of FetchSnippets down here once the separate
+  // FetchSnippets is not needed by snippets internals anymore, which will
+  // happen once we don't need host restricts anymore.
+  FetchSnippets(true);
 }
 
 void NTPSnippetsService::DismissSuggestion(const std::string& suggestion_id) {