Add MostVistedSites to ContentSuggestionsMediator

ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm b/ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm
index c87d9bf8854e1189dde65d5d545d71d8682e5b14..754c0bede4844a5addf2988bb8c0756b7e21e5bd 100644
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_collection_updater.mm
@@ -52,12 +52,14 @@ typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeHeader,
   ItemTypeEmpty,
   ItemTypeReadingList,
+  ItemTypeMostVisited,
 };
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierBookmarks = kSectionIdentifierEnumZero,
   SectionIdentifierArticles,
   SectionIdentifierReadingList,
+  SectionIdentifierMostVisited,
   SectionIdentifierDefault,
 };
 
@@ -70,6 +72,8 @@ ItemType ItemTypeForContentSuggestionType(ContentSuggestionType type) {
       return ItemTypeEmpty;
     case ContentSuggestionTypeReadingList:
       return ItemTypeReadingList;
+    case ContentSuggestionTypeMostVisited:
+      return ItemTypeMostVisited;
   }
 }
 
@@ -80,6 +84,8 @@ ContentSuggestionType ContentSuggestionTypeForItemType(NSInteger type) {
     return ContentSuggestionTypeEmpty;
   if (type == ItemTypeReadingList)
     return ContentSuggestionTypeReadingList;
+  if (type == ItemTypeMostVisited)
+    return ContentSuggestionTypeMostVisited;
   // Add new type here
 
   // Default type.
@@ -99,6 +105,9 @@ SectionIdentifier SectionIdentifierForInfo(
     case ContentSuggestionsSectionReadingList:
       return SectionIdentifierReadingList;
 
+    case ContentSuggestionsSectionMostVisited:
+      return SectionIdentifierMostVisited;
+
     case ContentSuggestionsSectionUnknown:
       return SectionIdentifierDefault;
   }
@@ -211,6 +220,14 @@ SectionIdentifier SectionIdentifierForInfo(
   [self.collectionViewController dismissSection:section];
 }
 
+- (void)reloadSection:(ContentSuggestionsSectionInformation*)sectionInfo {
+  // TODO(crbug.com/707754): implement this method.
+}
+
+- (void)faviconAvailableForURL:(const GURL&)URL {
+  // TODO(crbug.com/707754): implement this method.
+}
+
 #pragma mark - Public methods
 
 - (BOOL)shouldUseCustomStyleForSection:(NSInteger)section {
@@ -290,6 +307,10 @@ SectionIdentifier SectionIdentifierForInfo(
         [indexPaths addObject:addedIndexPath];
         break;
       }
+      case ContentSuggestionTypeMostVisited: {
+        // TODO(crbug.com/707754): Add the most visited item.
+        break;
+      }
     }
   }