Replace ToLower calls to the new format

components/signin/core/browser/signin_internals_util.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/signin/core/browser/signin_internals_util.h"
 
 #include <sstream>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 50 matching lines @@
 std::string GetTruncatedHash(const std::string& str) {
   if (str.empty())
     return str;
 
   // Since each character in the hash string generates two hex charaters
   // we only need half as many charaters in |hash_val| as hex characters
   // returned.
   const int kTruncateSize = kTruncateTokenStringLength / 2;
   char hash_val[kTruncateSize];
   crypto::SHA256HashString(str, &hash_val[0], kTruncateSize);
-  return base::StringToLowerASCII(base::HexEncode(&hash_val[0], kTruncateSize));
+  return base::ToLowerASCII(base::HexEncode(&hash_val[0], kTruncateSize));
 }
 
 } //  namespace signin_internals_util