include boringssl headers from third_party explicitly

crypto/hmac.cc

 // Copyright (c) 2012 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 <openssl/hmac.h>
 #include <stddef.h>
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "crypto/openssl_util.h"
 #include "crypto/secure_util.h"
 #include "crypto/symmetric_key.h"
+#include "third_party/boringssl/src/include/openssl/hmac.h"
 
 namespace crypto {
 
 HMAC::HMAC(HashAlgorithm hash_alg) : hash_alg_(hash_alg), initialized_(false) {
   // Only SHA-1 and SHA-256 hash algorithms are supported now.
   DCHECK(hash_alg_ == SHA1 || hash_alg_ == SHA256);
 }
 
 HMAC::~HMAC() {
   // Zero out key copy.
@@ skipping 57 matching lines @@
   std::unique_ptr<unsigned char[]> computed_digest(
       new unsigned char[digest_length]);
   if (!Sign(data, computed_digest.get(), digest_length))
     return false;
 
   return SecureMemEqual(digest.data(), computed_digest.get(),
                         std::min(digest.size(), digest_length));
 }
 
 }  // namespace crypto