ntp_tiles: Cleanup enum names

ios/chrome/browser/ui/ntp/google_landing_controller.mm

Index: ios/chrome/browser/ui/ntp/google_landing_controller.mm
diff --git a/ios/chrome/browser/ui/ntp/google_landing_controller.mm b/ios/chrome/browser/ui/ntp/google_landing_controller.mm
index 108372f2aedeed57e435b62192f0883d32855b8e..159ec21d9696e2a468aaf2653ea94633ec8ee514 100644
--- a/ios/chrome/browser/ui/ntp/google_landing_controller.mm
+++ b/ios/chrome/browser/ui/ntp/google_landing_controller.mm
@@ -349,7 +349,7 @@ void SearchEngineObserver::OnTemplateURLServiceChanged() {
 - (void)reloadData;
 // Logs a histogram due to a Most Visited item being opened.
 - (void)logMostVisitedClick:(const NSUInteger)visitedIndex
-                   tileType:(ntp_tiles::metrics::MostVisitedTileType)tileType;
+                   tileType:(ntp_tiles::TileVisualType)tileType;
 // Returns the size of |_mostVisitedData|.
 - (NSUInteger)numberOfItems;
 // Returns the number of non empty tiles (as opposed to the placeholder tiles).
@@ -1088,7 +1088,7 @@ void SearchEngineObserver::OnTemplateURLServiceChanged() {
 }
 
 - (void)logMostVisitedClick:(const NSUInteger)visitedIndex
-                   tileType:(ntp_tiles::metrics::MostVisitedTileType)tileType {
+                   tileType:(ntp_tiles::TileVisualType)tileType {
   new_tab_page_uma::RecordAction(
       _browserState, new_tab_page_uma::ACTION_OPENED_MOST_VISITED_ENTRY);
   base::RecordAction(UserMetricsAction("MobileNTPMostVisited"));
@@ -1104,7 +1104,7 @@ void SearchEngineObserver::OnTemplateURLServiceChanged() {
     _recordedPageImpression = YES;
     std::vector<ntp_tiles::metrics::TileImpression> tiles;
     for (const ntp_tiles::NTPTile& ntpTile : data) {
-      tiles.emplace_back(ntpTile.source, ntp_tiles::metrics::UNKNOWN_TILE_TYPE,
+      tiles.emplace_back(ntpTile.source, ntp_tiles::UNKNOWN_TILE_TYPE,
                          ntpTile.url);
     }
     ntp_tiles::metrics::RecordPageImpression(