Add field to monitor last visited time for each search engine

components/search_engines/template_url.h

 // 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_
 #define COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 563 matching lines @@
   bool safe_for_autoreplace() const { return data_.safe_for_autoreplace; }
 
   const std::vector<std::string>& input_encodings() const {
     return data_.input_encodings;
   }
 
   TemplateURLID id() const { return data_.id; }
 
   base::Time date_created() const { return data_.date_created; }
   base::Time last_modified() const { return data_.last_modified; }
+  base::Time last_visited() const { return data_.last_visited; }
 
   bool created_by_policy() const { return data_.created_by_policy; }
 
   int usage_count() const { return data_.usage_count; }
 
   int prepopulate_id() const { return data_.prepopulate_id; }
 
   const std::string& sync_guid() const { return data_.sync_guid; }
 
   // TODO(beaudoin): Rename this when renaming HasSearchTermsReplacementKey().
@@ skipping 159 matching lines @@
 
   // Caches the computed engine type across successive calls to GetEngineType().
   mutable SearchEngineType engine_type_;
 
   // TODO(sky): Add date last parsed OSD file.
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURL);
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_