[NTP Snippets] Always show the bookmarks section, but at the end if it's empty

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 133 matching lines @@
     Category category) {
   DCHECK_EQ(category, provided_category_);
   return category_status_;
 }
 
 CategoryInfo BookmarkSuggestionsProvider::GetCategoryInfo(Category category) {
   return CategoryInfo(
       l10n_util::GetStringUTF16(IDS_NTP_BOOKMARK_SUGGESTIONS_SECTION_HEADER),
       ContentSuggestionsCardLayout::MINIMAL_CARD,
       /* has_more_button */ true,
-      /* show_if_empty */ false);
+      /* show_if_empty */ true);
+  // TODO(treib): Setting show_if_empty to true is a temporary hack, see
+  // crbug.com/640568.
 }
 
 void BookmarkSuggestionsProvider::DismissSuggestion(
     const std::string& suggestion_id) {
   DCHECK(bookmark_model_->loaded());
   GURL url(GetWithinCategoryIDFromUniqueID(suggestion_id));
   MarkBookmarksDismissed(bookmark_model_, url);
 }
 
 void BookmarkSuggestionsProvider::FetchSuggestionImage(
@@ skipping 122 matching lines @@
 
 void BookmarkSuggestionsProvider::NotifyStatusChanged(
     CategoryStatus new_status) {
   if (category_status_ == new_status)
     return;
   category_status_ = new_status;
   observer()->OnCategoryStatusChanged(this, provided_category_, new_status);
 }
 
 }  // namespace ntp_snippets