Add ContentSuggestionsMediator

ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.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_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_expandable_item.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_favicon_item.h"
 
 @protocol ContentSuggestionsCommands;
+@protocol ContentSuggestionsDataSource;
 
 // CollectionViewController to display the suggestions items.
 @interface ContentSuggestionsViewController
     : CollectionViewController<ContentSuggestionsExpandableCellDelegate,
                                ContentSuggestionsFaviconCellDelegate>
 
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+                   dataSource:(id<ContentSuggestionsDataSource>)dataSource
+    NS_DESIGNATED_INITIALIZER;

[marq (ping after 24h), 2017/01/27 12:44:56]

nit: newline.

[gambard, 2017/01/30 15:19:17]

Done.

+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
 // Handler for the commands sent by the ContentSuggestionsViewController.
 @property(nonatomic, weak) id<ContentSuggestionsCommands>
     suggestionCommandHandler;
 
 // 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_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_VIEW_CONTROLLER_H_