Add support for components/ntp_tiles in InstantService

components/ntp_tiles/ntp_tile.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_H_
 #define COMPONENTS_NTP_TILES_NTP_TILE_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/ntp_tiles/ntp_tile_source.h"
 #include "url/gurl.h"
 
 namespace ntp_tiles {
 
 // A suggested site shown on the New Tab Page.
 struct NTPTile {
   base::string16 title;
   GURL url;
   NTPTileSource source;
 
   // Only valid for source == WHITELIST (empty otherwise).
   base::FilePath whitelist_icon_path;
 
+  // Only valid for source == SUGGESTIONS_SERVICE (empty otherwise).
+  // May point to a local chrome:// URL or to a remote one. May be empty.
+  GURL thumbnail_url;
+  // This won't be empty, but might 404 etc.
+  GURL favicon_url;
+
   NTPTile();
   NTPTile(const NTPTile&);
   ~NTPTile();
 };
 
 using NTPTilesVector = std::vector<NTPTile>;
 
 }  // namespace ntp_tiles
 
 #endif  // COMPONENTS_NTP_TILES_NTP_TILE_H_