[NTP Snippets] Pass "no suggestions" message from the backend to the UI

components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc

Index: components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
diff --git a/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc b/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
index 777e2a32254203dc78b58159c1def5634bc66d1a..7adbee26fd66e7f0fc020af461d032283cdd8a7f 100644
--- a/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
+++ b/components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc
@@ -74,17 +74,21 @@ CategoryStatus RecentTabSuggestionsProvider::GetCategoryStatus(
 
 CategoryInfo RecentTabSuggestionsProvider::GetCategoryInfo(Category category) {
   if (category == provided_category_) {

[dgn, 2016/10/26 14:05:40]

why not a DCHECK here like the others?

[Marc Treib, 2016/10/26 14:29:09]

No reason :)  Done.

-    return CategoryInfo(l10n_util::GetStringUTF16(
-                            IDS_NTP_RECENT_TAB_SUGGESTIONS_SECTION_HEADER),
-                        ContentSuggestionsCardLayout::MINIMAL_CARD,
-                        /*has_more_button=*/false,
-                        /*show_if_empty=*/false);
+    return CategoryInfo(
+        l10n_util::GetStringUTF16(
+            IDS_NTP_RECENT_TAB_SUGGESTIONS_SECTION_HEADER),
+        ContentSuggestionsCardLayout::MINIMAL_CARD,
+        /*has_more_button=*/false,
+        /*show_if_empty=*/false,
+        l10n_util::GetStringUTF16(IDS_NTP_SUGGESTIONS_SECTION_EMPTY));
+    // TODO(vitaliii): Replace IDS_NTP_SUGGESTIONS_SECTION_EMPTY with a
+    // category-specific string.
   }
   NOTREACHED() << "Unknown category " << category.id();
   return CategoryInfo(base::string16(),
                       ContentSuggestionsCardLayout::MINIMAL_CARD,
                       /*has_more_button=*/false,
-                      /*show_if_empty=*/false);
+                      /*show_if_empty=*/false, base::string16());
 }
 
 void RecentTabSuggestionsProvider::DismissSuggestion(