Add ContentSuggestionsMediator

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

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h b/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h
index df6a46da1ea2629a8e0c0c3d20d2221b32d44e63..b078851e870fa7278fbb91102a03b7e7678a545e 100644
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_view_controller.h
@@ -12,12 +12,20 @@
 #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;
+
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
 // Handler for the commands sent by the ContentSuggestionsViewController.
 @property(nonatomic, weak) id<ContentSuggestionsCommands>
     suggestionCommandHandler;