Revert of Remove client_certs from SSLCertRequestInfo.

net/ssl/client_cert_store_nss.h

Index: net/ssl/client_cert_store_nss.h
diff --git a/net/ssl/client_cert_store_nss.h b/net/ssl/client_cert_store_nss.h
index d49d50f6a43298eaac20d85756a637fdf0647654..60f6e214a4a650e878a531fa1a0f317033f0a08d 100644
--- a/net/ssl/client_cert_store_nss.h
+++ b/net/ssl/client_cert_store_nss.h
@@ -33,7 +33,8 @@
 
   // ClientCertStore:
   void GetClientCerts(const SSLCertRequestInfo& cert_request_info,
-                      const ClientCertListCallback& callback) override;
+                      CertificateList* selected_certs,
+                      const base::Closure& callback) override;
 
   // Examines the certificates in |certs| to find all certificates that match
   // the client certificate request in |request|, storing the matching
@@ -53,10 +54,11 @@
       net::CertificateList* certs);
 
  private:
-  CertificateList GetAndFilterCertsOnWorkerThread(
+  void GetAndFilterCertsOnWorkerThread(
       std::unique_ptr<crypto::CryptoModuleBlockingPasswordDelegate>
           password_delegate,
-      const SSLCertRequestInfo* request);
+      const SSLCertRequestInfo* request,
+      CertificateList* selected_certs);
 
   // The factory for creating the delegate for requesting a password to a
   // PKCS#11 token. May be null.