Replace ToLower calls to the new format

components/crx_file/crx_file.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 "components/crx_file/crx_file.h"
 
 #include "base/base64.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
@@ skipping 43 matching lines @@
 
 // Helper function to finish computing a hash and return an error if the
 // result of the hash didn't meet an expected base64-encoded value.
 CrxFile::ValidateError FinalizeHash(const std::string& extension_id,
                                     crypto::SecureHash* hash,
                                     const std::string& expected_hash) {
   CHECK(hash != nullptr);
   uint8 output[crypto::kSHA256Length] = {};
   hash->Finish(output, sizeof(output));
   std::string hash_base64 =
-      base::StringToLowerASCII(base::HexEncode(output, sizeof(output)));
+      base::ToLowerASCII(base::HexEncode(output, sizeof(output)));
   if (hash_base64 != expected_hash) {
     LOG(ERROR) << "Hash check failed for extension: " << extension_id
                << ", expected " << expected_hash << ", got " << hash_base64;
     return CrxFile::ValidateError::CRX_HASH_VERIFICATION_FAILED;
   } else {
     return CrxFile::ValidateError::NONE;
   }
 }
 
 }  // namespace
@@ skipping 137 matching lines @@
   else if (header.signature_size > kMaxSignatureSize)
     *error = kInvalidSignatureTooLarge;
   else if (header.signature_size == 0)
     *error = kInvalidSignatureTooSmall;
   else
     valid = true;
   return valid;
 }
 
 }  // namespace crx_file