Suggestions UI - Add Data Source and Item

ios/chrome/browser/ui/suggestions/suggestions_item.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_ITEM_H_
+#define IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_ITEM_H_
+
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
+
+// Item for a suggestions item with a title and subtitle.
+@interface SuggestionsItem : CollectionViewItem
+
+// Init a suggestions item with a |title| and a |subtitle|. |type| is the type
+// of the item.
+- (instancetype)initWithType:(NSInteger)type
+                       title:(NSString*)title
+                    subtitle:(NSString*)subtitle NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithType:(NSInteger)type NS_UNAVAILABLE;
+
+@end
+
+// Corresponding cell for a suggestion item.
+@interface SuggestionsCell : MDCCollectionViewCell
+
+@property(nonatomic, readonly, strong) UIButton* titleButton;
+@property(nonatomic, readonly, strong) UILabel* detailTextLabel;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_ITEM_H_