Support action button to fetch more content suggestions

components/ntp_snippets/content_suggestions_service.cc

Index: components/ntp_snippets/content_suggestions_service.cc
diff --git a/components/ntp_snippets/content_suggestions_service.cc b/components/ntp_snippets/content_suggestions_service.cc
index 3311d45624a4372568a304e857f205ae9f105b79..adc71573280f5b33f0b51f51be9bbb6e0f023bba 100644
--- a/components/ntp_snippets/content_suggestions_service.cc
+++ b/components/ntp_snippets/content_suggestions_service.cc
@@ -187,6 +187,10 @@ void ContentSuggestionsService::OnNewSuggestions(
     NotifyCategoryStatusChanged(category);
   }
 
+  if (!IsCategoryStatusAvailable(provider->GetCategoryStatus(category))) {
+    return;
+  }
+
   for (const ContentSuggestion& suggestion :
        suggestions_by_category_[category]) {
     id_category_map_.erase(suggestion.id());