Add header for the Content Suggestions

ios/chrome/browser/ui/content_suggestions/content_suggestions_header_item.h

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_header_item.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_header_item.h b/ios/chrome/browser/ui/content_suggestions/content_suggestions_header_item.h
new file mode 100644
index 0000000000000000000000000000000000000000..f6de17ed763acd6802f5b85e188a963bbad1c38a
--- /dev/null
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_header_item.h
@@ -0,0 +1,16 @@
+// 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_CONTENT_SUGGESTIONS_HEADER_ITEM_H_
+#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_HEADER_ITEM_H_
+
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
+#import "ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier.h"
+
+@interface ContentSuggestionsHeaderItem

[lpromero, 2017/03/16 16:43:21]

Can you add a comment? I am not a fan of subclassing CollectionViewTextItem.
Where do you use the suggestionIdentifier you are strapping to this item? Since
it is a header and not a suggestion, how come it even can have a suggestion
identifier?

[gambard, 2017/03/17 09:33:39]

Done.

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