ntp_tiles: Cleanup enum names

chrome/browser/search/instant_service_unittest.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/search/instant_service.h"
 
 #include <memory>
 #include <string>
 #include <tuple>
 #include <vector>
@@ skipping 165 matching lines @@
 }
 
 TEST_F(InstantServiceTest, GetSuggestionFromClientSide) {
   history::MostVisitedURLList url_list;
   url_list.push_back(history::MostVisitedURL());
 
   instant_service_->OnTopSitesReceived(url_list);
 
   auto items = instant_service_->most_visited_items_;
   ASSERT_EQ(1, (int)items.size());
-  ASSERT_EQ(ntp_tiles::NTPTileSource::TOP_SITES, items[0].source);
+  ASSERT_EQ(ntp_tiles::TileSource::TOP_SITES, items[0].source);
 }