Identify MostVisited by item instead of URL

ios/chrome/browser/content_suggestions/mediator_util.mm

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/content_suggestions/mediator_util.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "components/ntp_snippets/category.h"
 #include "components/ntp_tiles/metrics.h"
 #include "components/rappor/rappor_service_impl.h"
@@ skipping 104 matching lines @@
 void RecordPageImpression(const ntp_tiles::NTPTilesVector& mostVisited) {
   std::vector<ntp_tiles::metrics::TileImpression> tiles;
   for (const ntp_tiles::NTPTile& ntpTile : mostVisited) {
     tiles.emplace_back(ntpTile.source, ntp_tiles::UNKNOWN_TILE_TYPE,
                        ntpTile.url);
   }
   ntp_tiles::metrics::RecordPageImpression(
       tiles, GetApplicationContext()->GetRapporServiceImpl());
 }
 
-CollectionViewItem<SuggestedContent>* ConvertNTPTile(
+ContentSuggestionsMostVisitedItem* ConvertNTPTile(
     const ntp_tiles::NTPTile& tile,
     ContentSuggestionsSectionInformation* sectionInfo) {
   ContentSuggestionsMostVisitedItem* suggestion =
       [[ContentSuggestionsMostVisitedItem alloc] initWithType:0];
 
   suggestion.title = base::SysUTF16ToNSString(tile.title);
   suggestion.URL = tile.url;
 
   suggestion.suggestionIdentifier = [[ContentSuggestionIdentifier alloc] init];
   suggestion.suggestionIdentifier.IDInSection = tile.url.spec();
   suggestion.suggestionIdentifier.sectionInfo = sectionInfo;
 
   return suggestion;
 }