[Suggestions] Adding a Thumbnail Manager for the Suggestions Service

chrome/browser/search/suggestions/proto/suggestions.proto

 // Copyright 2014 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package suggestions;
 
 // The SuggestionsProfile is a protobuf response from the server that contains
 // the list of suggestions to be presented to the user.
 //
 // Next tag: 2
 message SuggestionsProfile {
   repeated ChromeSuggestion suggestions = 1;
 }
 
 // The suggestions for this user, ordered from best to worst.
 //
 // Next tag: 3
 message ChromeSuggestion {
   // The URL of the suggestion.
   optional string url = 1;
 
   // Title of the suggestion.
   optional string title = 2;
+
+  // The URL of the favicon associated with this page.
+  optional string favicon_url = 3;
+
+  // The URL of the thumbnail associated with this page.
+  optional string thumbnail = 4;
 }