[Android] Allow setting recently visited search engines as default search engine

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 664fa3390a3a2ec1775d070a925493347201018e..4d7a28455a200cfcd4ac1674cdd7b72b758b6b31 100644
--- a/components/search_engines/template_url_service.cc
+++ b/components/search_engines/template_url_service.cc
@@ -395,10 +395,15 @@ bool TemplateURLService::CanAddAutogeneratedKeyword(
       CanAddAutogeneratedKeywordForHost(url.host());
 }
 
+bool TemplateURLService::IsPrepopulatedOrCreatedByPolicy(
+    const TemplateURL* t_url) {
+  return (t_url->prepopulate_id() > 0 || t_url->created_by_policy()) &&
+      t_url->SupportsReplacement(search_terms_data());
+}
+
 bool TemplateURLService::ShowInDefaultList(const TemplateURL* t_url) {
-  return (t_url == default_search_provider_ || t_url->prepopulate_id() > 0 ||
-          t_url->created_by_policy()) &&
-         t_url->SupportsReplacement(search_terms_data());
+  return t_url == default_search_provider_ ||
+      IsPrepopulatedOrCreatedByPolicy(t_url);
 }
 
 void TemplateURLService::AddMatchingKeywords(