Suggestions UI - Add Data Source and Item

ios/chrome/browser/ui/suggestions/suggestions_collection_updater.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_COLLECTION_UPDATER_H_
+#define IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_COLLECTION_UPDATER_H_
+
+#import <UIKit/UIKit.h>
+
+@class CollectionViewController;
+
+// Updater for a CollectionViewController populating it with some items and
+// handling the items addition.
+@interface SuggestionsCollectionUpdater : NSObject
+
+// |collectionViewController| this Updater will update.
+- (instancetype)initWithCollectionViewController:
+    (CollectionViewController*)collectionViewController
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+// Adds a text item with a |title| and a |subtitle| in the section numbered
+// |section|. If |section| is greater than the current number of section, it
+// will add a new section at the end.
+- (void)addTextItem:(NSString*)title
+           subtitle:(NSString*)subtitle
+          toSection:(NSInteger)inputSection;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_COLLECTION_UPDATER_H_