Add field to monitor last visited time for each search engine

components/search_engines/template_url_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_data.h"
 
 #include "base/guid.h"
 #include "base/i18n/case_conversion.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 
 TemplateURLData::TemplateURLData()
     : safe_for_autoreplace(false),
       id(0),
       date_created(base::Time::Now()),
       last_modified(base::Time::Now()),
+      last_visited(base::Time()),
       created_by_policy(false),
       usage_count(0),
       prepopulate_id(0),
       sync_guid(base::GenerateGUID()),
       keyword_(base::ASCIIToUTF16("dummy")),
       url_("x") {}
 
 TemplateURLData::TemplateURLData(const TemplateURLData& other) = default;
 
 TemplateURLData::TemplateURLData(const base::string16& name,
@@ skipping 60 matching lines @@
 
   // Case sensitive keyword matching is confusing. As such, we force all
   // keywords to be lower case.
   keyword_ = base::i18n::ToLower(keyword);
 }
 
 void TemplateURLData::SetURL(const std::string& url) {
   DCHECK(!url.empty());
   url_ = url;
 }