[NTP Snippets] Properly restore the status of restored sections

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 8b1bdc15eae83a3180fece814448f8805d01484f..56497a741f085725b8ad2b232d2c69e70fdf0cdf 100644
--- a/components/ntp_snippets/content_suggestions_service.cc
+++ b/components/ntp_snippets/content_suggestions_service.cc
@@ -192,8 +192,11 @@ void ContentSuggestionsService::OnNewSuggestions(
   if (RegisterCategoryIfRequired(provider, category))
     NotifyCategoryStatusChanged(category);
 
-  if (!IsCategoryStatusAvailable(provider->GetCategoryStatus(category)))
+  if (!IsCategoryStatusAvailable(provider->GetCategoryStatus(category))) {
+    // A provider shouldn't send us suggestions while it's not available.
+    DCHECK(suggestions.empty());
     return;
+  }
 
   suggestions_by_category_[category] = std::move(suggestions);