Cleanup desktop NTP metrics recording, part 2

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.
 // Note: Keep in sync with browser/resources/local_ntp/most_visited_single.js
 enum NTPLoggingEventType {
   // A suggestion coming from the server was rendered.
-  NTP_SERVER_SIDE_SUGGESTION = 0,
+  // Deleted: NTP_SERVER_SIDE_SUGGESTION = 0,
 
   // A suggestion coming from the client was rendered.
-  NTP_CLIENT_SIDE_SUGGESTION = 1,
+  // Deleted: NTP_CLIENT_SIDE_SUGGESTION = 1,
 
   // Indicates a tile was rendered, no matter if it's a thumbnail, a gray tile
   // or an external tile.
   // Deleted: NTP_TILE = 2,
 
   // The tile uses a local thumbnail image.
   // Deleted: NTP_THUMBNAIL_TILE = 3,
 
   // Used when no thumbnail is specified and a gray tile with the domain is used
   // as the main tile.
@@ skipping 28 matching lines @@
 // 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_