Reduce buggy usage of the registry controlled domain service.

net/base/registry_controlled_domains/registry_controlled_domain.cc

Index: net/base/registry_controlled_domains/registry_controlled_domain.cc
diff --git a/net/base/registry_controlled_domains/registry_controlled_domain.cc b/net/base/registry_controlled_domains/registry_controlled_domain.cc
index 607d735f3080be6b37354b5963064df6e78bd7fa..67df13044ce85dc1e5965807c6b1df86baba8eca 100644
--- a/net/base/registry_controlled_domains/registry_controlled_domain.cc
+++ b/net/base/registry_controlled_domains/registry_controlled_domain.cc
@@ -241,20 +241,34 @@ size_t GetRegistryLength(
   base::StringPiece host = gurl.host_piece();
   if (host.empty())
     return std::string::npos;
-  if (gurl.HostIsIPAddress())
-    return 0;
   return GetRegistryLengthImpl(host, unknown_filter, private_filter);
 }
 
-size_t GetRegistryLength(base::StringPiece host,
-                         UnknownRegistryFilter unknown_filter,
-                         PrivateRegistryFilter private_filter) {
+bool HostHasRegistryControlledDomain(base::StringPiece host,
+                                     UnknownRegistryFilter unknown_filter,
+                                     PrivateRegistryFilter private_filter) {
+  url::CanonHostInfo host_info;
+  const std::string canon_host(CanonicalizeHost(host, &host_info));
+  if (canon_host.empty())
+    return false;
+  return GetRegistryLengthImpl(canon_host, unknown_filter, private_filter) > 0;
+}
+
+size_t GetRegistryLengthForCanonicalHost(base::StringPiece canon_host,
+                                         UnknownRegistryFilter unknown_filter,
+                                         PrivateRegistryFilter private_filter) {
+  if (canon_host.empty())
+    return std::string::npos;
+  return GetRegistryLengthImpl(canon_host, unknown_filter, private_filter);
+}
+
+size_t BuggyGetHostRegistryLength(const std::string& host,
+                                  UnknownRegistryFilter unknown_filter,
+                                  PrivateRegistryFilter private_filter) {
   url::CanonHostInfo host_info;
   const std::string canon_host(CanonicalizeHost(host, &host_info));
   if (canon_host.empty())
     return std::string::npos;
-  if (host_info.IsIPAddress())
-    return 0;
   return GetRegistryLengthImpl(canon_host, unknown_filter, private_filter);
 }