Revert r92977 partially to fix a certificate verification regression

net/socket/ssl_client_socket_nss.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file includes code SSLClientSocketNSS::DoVerifyCertComplete() derived
 // from AuthCertificateCallback() in
 // mozilla/security/manager/ssl/src/nsNSSCallbacks.cpp.
 
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
@@ skipping 2037 matching lines @@
     if (!chain_context) {
       DWORD err = GetLastError();
       if (err != CRYPT_E_NOT_FOUND)
         DLOG(ERROR) << "CertFindChainInStore failed: " << err;
       break;
     }
 
     // Get the leaf certificate.
     PCCERT_CONTEXT cert_context =
         chain_context->rgpChain[0]->rgpElement[0]->pCertContext;
-    // Copy the certificate into a NULL store, so that we can close the "MY"
-    // store before returning from this function.
+    // Copy it to our own certificate store, so that we can close the "MY"
+    // certificate store before returning from this function.
     PCCERT_CONTEXT cert_context2;
-    BOOL ok = CertAddCertificateContextToStore(NULL, cert_context,
+    BOOL ok = CertAddCertificateContextToStore(X509Certificate::cert_store(),
+                                               cert_context,
                                                CERT_STORE_ADD_USE_EXISTING,
                                                &cert_context2);
     if (!ok) {
       NOTREACHED();
       continue;
     }
 
     // Copy the rest of the chain to our own store as well. Copying the chain
     // stops gracefully if an error is encountered, with the partial chain
     // being used as the intermediates, rather than failing to consider the
     // client certificate.
     net::X509Certificate::OSCertHandles intermediates;
     for (DWORD i = 1; i < chain_context->rgpChain[0]->cElement; i++) {
       PCCERT_CONTEXT intermediate_copy;
-      ok = CertAddCertificateContextToStore(
-          NULL, chain_context->rgpChain[0]->rgpElement[i]->pCertContext,
+      ok = CertAddCertificateContextToStore(X509Certificate::cert_store(),
+          chain_context->rgpChain[0]->rgpElement[i]->pCertContext,
           CERT_STORE_ADD_USE_EXISTING, &intermediate_copy);
       if (!ok) {
         NOTREACHED();
         break;
       }
       intermediates.push_back(intermediate_copy);
     }
 
     scoped_refptr<X509Certificate> cert = X509Certificate::CreateFromHandle(
         cert_context2, intermediates);
@@ skipping 192 matching lines @@
   valid_thread_id_ = base::PlatformThread::CurrentId();
 }
 
 bool SSLClientSocketNSS::CalledOnValidThread() const {
   EnsureThreadIdAssigned();
   base::AutoLock auto_lock(lock_);
   return valid_thread_id_ == base::PlatformThread::CurrentId();
 }
 
 }  // namespace net