Reduce buggy usage of the registry controlled domain service.

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 ee12247b7e05e9ee6eb700c5464e914503b57d10..f0e250dcdc68e4a7f9256d5985182be2e5a8fa8b 100644
--- a/components/search_engines/template_url_service.cc
+++ b/components/search_engines/template_url_service.cc
@@ -153,8 +153,8 @@ void LogDuplicatesHistogram(
 // Returns the length of the registry portion of a hostname.  For example,
 // www.google.co.uk will return 5 (the length of co.uk).
 size_t GetRegistryLength(const base::string16& host) {
-  return net::registry_controlled_domains::GetRegistryLength(
-      base::UTF16ToUTF8(host),
+  return net::registry_controlled_domains::PermissiveGetHostRegistryLength(
+      host,
       net::registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES,
       net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
 }