Fixed slot selection in HMAC class to ensure that we are using softtoken instead of TPM slots.

crypto/hmac_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.
 
 #include "crypto/hmac.h"
 
 #include <nss.h>
 #include <pk11pub.h>
 
 #include "base/logging.h"
@@ skipping 82 matching lines @@
   }
 
   if (PK11_DigestBegin(context.get()) != SECSuccess) {
     NOTREACHED();
     return false;
   }
 
   if (PK11_DigestOp(context.get(),
                     reinterpret_cast<const unsigned char*>(data.data()),
                     data.length()) != SECSuccess) {
-    LOG(WARNING) << "PK11_DigestOp failed, error " << PORT_GetError()
-                 << ", slot name " << PK11_GetSlotName(plat_->slot_.get())
-                 << ", token name " << PK11_GetTokenName(plat_->slot_.get());
     NOTREACHED();
     return false;
   }
 
   unsigned int len = 0;
   if (PK11_DigestFinal(context.get(),
                        digest, &len, digest_length) != SECSuccess) {
     NOTREACHED();
     return false;
   }
 
   return true;
 }
 
 }  // namespace crypto