Replace ToLower calls to the new format

chrome/browser/chromeos/settings/token_encryptor.cc

 // Copyright 2013 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/settings/token_encryptor.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 70 matching lines @@
     return std::string();
   }
   std::string nonce = salt.substr(0, kNonceSize);
   std::string encoded_token;
   CHECK(encryptor.SetCounter(nonce));
   if (!encryptor.Encrypt(token, &encoded_token)) {
     LOG(WARNING) << "Failed to encrypt token.";
     return std::string();
   }
 
-  return base::StringToLowerASCII(base::HexEncode(
-      reinterpret_cast<const void*>(encoded_token.data()),
-      encoded_token.size()));
+  return base::ToLowerASCII(
+      base::HexEncode(reinterpret_cast<const void*>(encoded_token.data()),
+                      encoded_token.size()));
 }
 
 std::string CryptohomeTokenEncryptor::DecryptTokenWithKey(
     crypto::SymmetricKey* key,
     const std::string& salt,
     const std::string& encrypted_token_hex) {
   std::vector<uint8> encrypted_token_bytes;
   if (!base::HexStringToBytes(encrypted_token_hex, &encrypted_token_bytes)) {
     LOG(WARNING) << "Corrupt encrypted token found.";
     return std::string();
@@ skipping 12 matching lines @@
   std::string token;
   CHECK(encryptor.SetCounter(nonce));
   if (!encryptor.Decrypt(encrypted_token, &token)) {
     LOG(WARNING) << "Failed to decrypt token.";
     return std::string();
   }
   return token;
 }
 
 }  // namespace chromeos