Use the same design for all suggestions

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

Index: ios/chrome/browser/ui/content_suggestions/content_suggestion.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestion.h b/ios/chrome/browser/ui/content_suggestions/content_suggestion.h
index 77a101fe3c09fdaa59713391e6ca7fdf879e6bff..a0d1571a895d61215f98c03296a8e6891f54a7b4 100644
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestion.h
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestion.h
@@ -41,10 +41,8 @@ typedef NS_ENUM(NSInteger, ContentSuggestionType) {
 @property(nonatomic, copy, nullable) NSString* publisher;
 // The date of publication.
 @property(nonatomic, assign) base::Time publishDate;
-
-// Extra information, only available if the suggestion is of type reading list.
-@property(nonatomic, strong, nullable)
-    ContentSuggestionReadingListExtra* readingListExtra;
+// Whether the suggestion is available offline.
+@property(nonatomic, assign) BOOL availableOffline;
 
 @property(nonatomic, assign) ContentSuggestionType type;