Cleanup: Replace NTPLoggingTileSource by ntp_tiles::NTPTileSource

components/ntp_tiles/ntp_tile_source.h

+// Copyright 2016 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 COMPONENTS_NTP_TILES_NTP_TILE_SOURCE_H_
+#define COMPONENTS_NTP_TILES_NTP_TILE_SOURCE_H_
+
+namespace ntp_tiles {
+
+// The source of an NTP tile.
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser.ntp
+enum class NTPTileSource {
+  // Tile comes from the personal top sites list, based on local history.
+  TOP_SITES,
+  // Tile comes from the suggestions service, based on synced history.
+  SUGGESTIONS_SERVICE,
+  // Tile is regionally popular.
+  POPULAR,
+  // Tile is on a custodian-managed whitelist.
+  WHITELIST,
+
+  LAST = WHITELIST
+};
+
+}  // namespace ntp_tiles
+
+#endif  // COMPONENTS_NTP_TILES_NTP_TILE_SOURCE_H_