Revert of Remove client_certs from SSLCertRequestInfo.

net/ssl/client_cert_store_mac.cc

Index: net/ssl/client_cert_store_mac.cc
diff --git a/net/ssl/client_cert_store_mac.cc b/net/ssl/client_cert_store_mac.cc
index 80035244e441e5adba6a47f8f1358309c7fa769a..a3ef5899155d3a1f3fec7da227c3af7845724fd7 100644
--- a/net/ssl/client_cert_store_mac.cc
+++ b/net/ssl/client_cert_store_mac.cc
@@ -236,9 +236,9 @@
 
 ClientCertStoreMac::~ClientCertStoreMac() {}
 
-void ClientCertStoreMac::GetClientCerts(
-    const SSLCertRequestInfo& request,
-    const ClientCertListCallback& callback) {
+void ClientCertStoreMac::GetClientCerts(const SSLCertRequestInfo& request,
+                                         CertificateList* selected_certs,
+                                         const base::Closure& callback) {
   std::string server_domain = request.host_and_port.host();
 
   ScopedCFTypeRef<SecIdentityRef> preferred_identity;
@@ -270,7 +270,8 @@
     err = SecIdentitySearchCreate(NULL, CSSM_KEYUSE_SIGN, &search);
   }
   if (err) {
-    callback.Run(CertificateList());
+    selected_certs->clear();
+    callback.Run();
     return;
   }
   ScopedCFTypeRef<SecIdentitySearchRef> scoped_search(search);
@@ -310,14 +311,14 @@
 
   if (err != errSecItemNotFound) {
     OSSTATUS_LOG(ERROR, err) << "SecIdentitySearch error";
-    callback.Run(CertificateList());
+    selected_certs->clear();
+    callback.Run();
     return;
   }
 
-  CertificateList selected_certs;
   GetClientCertsImpl(preferred_cert, regular_certs, request, true,
-                     &selected_certs);
-  callback.Run(std::move(selected_certs));
+                     selected_certs);
+  callback.Run();
 }
 
 bool ClientCertStoreMac::SelectClientCertsForTesting(