Add FaviconAttributesProvider to ContentSuggestions

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

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h b/ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h
index 3758b553f90aa4660b2bcb9c92c968a9049c392b..fc7bfe16f3c95a10d476ed054af8a60ae2ce3252 100644
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h
@@ -8,8 +8,10 @@
 @class ContentSuggestion;
 @class ContentSuggestionIdentifier;
 @class ContentSuggestionsSectionInformation;
+@class FaviconAttributes;
 @protocol ContentSuggestionsDataSink;
 @protocol ContentSuggestionsImageFetcher;
+class GURL;
 
 // Typedef for a block taking the fetched suggestions as parameter.
 typedef void (^MoreSuggestionsFetched)(NSArray<ContentSuggestion*>* _Nonnull);
@@ -32,6 +34,12 @@ typedef void (^MoreSuggestionsFetched)(NSArray<ContentSuggestion*>* _Nonnull);
 // Returns an image updater for the suggestions provided by this data source.
 - (nullable id<ContentSuggestionsImageFetcher>)imageFetcher;
 
+// Fetches favicon attributes and calls the completion block.
+- (void)fetchFaviconAttributesForURL:(const GURL&)URL
+                          completion:
+                              (void (^_Nonnull)(FaviconAttributes* _Nonnull))
+                                  completion;
+
 // Fetches additional content. All the |knownSuggestions| must come from the
 // same |sectionInfo|. If the fetch was completed, the given |callback| is
 // called with the new content.