Add support for split PSL list distinctions.

content/browser/site_instance_impl.cc

Index: content/browser/site_instance_impl.cc
diff --git a/content/browser/site_instance_impl.cc b/content/browser/site_instance_impl.cc
index 3a93f25c9fa5de8db5c3b77772fed47daedd22bd..31b257903c9b42a13c9377f773adf5869cb78698 100644
--- a/content/browser/site_instance_impl.cc
+++ b/content/browser/site_instance_impl.cc
@@ -265,7 +265,8 @@ bool SiteInstance::IsSameWebSite(BrowserContext* browser_context,
   if (url1.scheme() != url2.scheme())
     return false;
 
-  return net::RegistryControlledDomainService::SameDomainOrHost(url1, url2);
+  return net::RegistryControlledDomainService::SameDomainOrHost(url1, url2,
+      net::RCDS::EXCLUDE_PRIVATE_REGISTRIES);
 }
 
 /*static*/
@@ -298,7 +299,8 @@ GURL SiteInstance::GetSiteForURL(BrowserContext* browser_context,
 
     // If this URL has a registered domain, we only want to remember that part.
     std::string domain =
-        net::RegistryControlledDomainService::GetDomainAndRegistry(url);
+        net::RegistryControlledDomainService::GetDomainAndRegistry(url,
+            net::RCDS::EXCLUDE_PRIVATE_REGISTRIES);
     if (!domain.empty()) {
       GURL::Replacements rep;
       rep.SetHostStr(domain);