Fix some issues found looking at the code. I have made two posts about it:...

base/hmac_nss.cc

 // Copyright (c) 2008 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 "base/hmac.h"
 
 #include <nss.h>
 #include <pk11pub.h>
 
 #include "base/logging.h"
@@ skipping 48 matching lines @@
   plat_->sym_key_.reset(PK11_ImportSymKey(plat_->slot_.get(),
                                           CKM_SHA_1_HMAC,
                                           PK11_OriginUnwrap,
                                           CKA_SIGN,
                                           &key_item,
                                           NULL));
   CHECK(plat_->sym_key_.get());
 }
 
 HMAC::~HMAC() {
-  delete plat_;
 }
 
 bool HMAC::Sign(const std::string& data,
                 unsigned char* digest,
                 int digest_length) {
   SECItem param = { siBuffer, NULL, 0 };
   ScopedNSSContext context(PK11_CreateContextBySymKey(CKM_SHA_1_HMAC,
                                                       CKA_SIGN,
                                                       plat_->sym_key_.get(),
                                                       &param));
@@ skipping 18 matching lines @@
   if (PK11_DigestFinal(context.get(),
                        digest, &len, digest_length) != SECSuccess) {
     NOTREACHED();
     return false;
   }
 
   return true;
 }
 
 }  // namespace base