Add a message to empty ContentSuggestions sections

ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_text_item.h

Index: ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_text_item.h
diff --git a/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_text_item.h b/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_text_item.h
new file mode 100644
index 0000000000000000000000000000000000000000..6c6a7b1699eb141a256932639362a0ce2748c9de
--- /dev/null
+++ b/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_text_item.h
@@ -0,0 +1,19 @@
+// Copyright 2017 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CELLS_CONTENT_SUGGESTIONS_TEXT_ITEM_H_
+#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CELLS_CONTENT_SUGGESTIONS_TEXT_ITEM_H_
+
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
+#import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestion_identifier.h"
+
+// ContentSuggestions wrapper for CollectionViewTextItem. No functionalities
+// should be added to this item, subclass CollectionViewItem directly if more
+// functionalities are needed.
+@interface ContentSuggestionsTextItem

[lpromero, 2017/03/23 10:54:37]

Not a fan of that old friend…
If what you need is just an item that takes a text, detail text and
suggestionIdentifier, we might as well create it. It can define
CollectionViewTextCell as its cellClass, that way you won't have to create a
cell class.

[gambard, 2017/03/23 15:25:49]

Done.

+    : CollectionViewTextItem<ContentSuggestionIdentification>
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CELLS_CONTENT_SUGGESTIONS_TEXT_ITEM_H_