Deleted redundant SymmetricKey::GetRawKey().

chrome/browser/chromeos/login/supervised/supervised_user_authentication.cc

 // Copyright 2014 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 "chrome/browser/chromeos/login/supervised/supervised_user_authentication.h"
 
 #include "base/base64.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 29 matching lines @@
     char result[kSaltSize];
     crypto::RandBytes(&result, sizeof(result));
     return base::ToLowerASCII(
         base::HexEncode(reinterpret_cast<const void*>(result), sizeof(result)));
 }
 
 std::string BuildRawHMACKey() {
   std::unique_ptr<crypto::SymmetricKey> key(
       crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES,
                                               kHMACKeySizeInBits));
-  std::string raw_result, result;
-  key->GetRawKey(&raw_result);
-  base::Base64Encode(raw_result, &result);
+  std::string result;
+  base::Base64Encode(key->key(), &result);
   return result;
 }
 
 base::DictionaryValue* LoadPasswordData(base::FilePath profile_dir) {
   JSONFileValueDeserializer deserializer(
       profile_dir.Append(kPasswordUpdateFile));
   std::string error_message;
   int error_code = JSONFileValueDeserializer::JSON_NO_ERROR;
   std::unique_ptr<base::Value> value =
       deserializer.Deserialize(&error_code, &error_message);
@@ skipping 255 matching lines @@
     LOG(FATAL) << "HMAC::Sign failed";
 
   std::string raw_result(out_bytes, out_bytes + sizeof(out_bytes));
 
   std::string result;
   base::Base64Encode(raw_result, &result);
   return result;
 }
 
 }  // namespace chromeos