Cleanup: Replace NTPLoggingTileSource by ntp_tiles::NTPTileSource

chrome/common/search/ntp_logging_events.h

 // 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.
 
 #ifndef CHROME_COMMON_SEARCH_NTP_LOGGING_EVENTS_H_
 #define CHROME_COMMON_SEARCH_NTP_LOGGING_EVENTS_H_
 
 // The different types of events that are logged from the NTP. This enum is used
 // to transfer information from the NTP javascript to the renderer and is not
 // used as a UMA enum histogram's logged value.
@@ skipping 35 matching lines @@
   // the multi-iframe version of the NTP.
   // Deleted: NTP_TILE_LOADED = 10,
 
   // All NTP tiles have finished loading (successfully or failing). Logged only
   // by the single-iframe version of the NTP.
   NTP_ALL_TILES_LOADED = 11,
 
   NTP_EVENT_TYPE_LAST = NTP_ALL_TILES_LOADED
 };
 
-// The source of an NTP tile.
-// Note: Keep in sync with browser/resources/local_ntp/most_visited_single.js.
-// TODO(treib): Merge this into MostVisitedSource from components/ntp_tiles.
-enum class NTPLoggingTileSource {
-  CLIENT = 0,
-  SERVER = 1,
-  LAST = SERVER
-};
-
 #endif  // CHROME_COMMON_SEARCH_NTP_LOGGING_EVENTS_H_