[Android] Sort custom search engines based on last visited time and display only top 3 most recentl…

components/search_engines/template_url_service.cc

Index: components/search_engines/template_url_service.cc
diff --git a/components/search_engines/template_url_service.cc b/components/search_engines/template_url_service.cc
index 2b5983b1f5403fdf60637eb3b15bdaaf1ce76786..13d8c697d8ffdd7b1c3a660b77343f29650bb6bc 100644
--- a/components/search_engines/template_url_service.cc
+++ b/components/search_engines/template_url_service.cc
@@ -611,6 +611,13 @@ void TemplateURLService::ResetTemplateURL(TemplateURL* url,
     NotifyObservers();
 }
 
+void TemplateURLService::UpdateTemplateURLVisitTime(TemplateURL* url) {
+  TemplateURLData data(url->data());
+  data.last_visited = clock_->Now();
+  Update(url, TemplateURL(data));
+}
+
+
 bool TemplateURLService::CanMakeDefault(const TemplateURL* url) {
   return
       ((default_search_provider_source_ == DefaultSearchManager::FROM_USER) ||
@@ -730,12 +737,6 @@ void TemplateURLService::RepairPrepopulatedSearchEngines() {
   }
 }
 
-void TemplateURLService::UpdateTemplateURLVisitTime(TemplateURL* url) {
-  TemplateURLData data(url->data());
-  data.last_visited = clock_->Now();
-  Update(url, TemplateURL(data));
-}
-
 void TemplateURLService::AddObserver(TemplateURLServiceObserver* observer) {
   model_observers_.AddObserver(observer);
 }