Add field to monitor last visited time for each search engine

components/search_engines/template_url_prepopulate_data.cc

 // 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.
 
 #include "components/search_engines/template_url_prepopulate_data.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include <locale.h>
 #endif
 
@@ skipping 995 matching lines @@
   data->contextual_search_url = contextual_search_url.as_string();
   data->search_url_post_params = search_url_post_params.as_string();
   data->suggestions_url_post_params = suggest_url_post_params.as_string();
   data->instant_url_post_params = instant_url_post_params.as_string();
   data->image_url_post_params = image_url_post_params.as_string();
   data->favicon_url = GURL(favicon_url);
   data->safe_for_autoreplace = true;
   data->input_encodings.push_back(encoding.as_string());
   data->date_created = base::Time();
   data->last_modified = base::Time();
+  data->last_visited = base::Time();

[Peter Kasting, 2016/11/21 03:35:08]

Nit: See comments in settings_overrides_api.cc

[ltian, 2016/11/28 22:08:02]

Done.

   data->prepopulate_id = id;
   for (size_t i = 0; i < alternate_urls.GetSize(); ++i) {
     std::string alternate_url;
     alternate_urls.GetString(i, &alternate_url);
     DCHECK(!alternate_url.empty());
     data->alternate_urls.push_back(alternate_url);
   }
   data->search_terms_replacement_key = search_terms_replacement_key.as_string();
   return data;
 }
@@ skipping 235 matching lines @@
   locale_str.erase(0, territory_delim + 1);
 
   // Next remove any codeset/modifier portion and uppercase.
   return CountryStringToCountryID(
       base::ToUpperASCII(locale_str.substr(0, locale_str.find_first_of(".@"))));
 }
 
 #endif  // OS_*
 
 }  // namespace TemplateURLPrepopulateData