Replace ToLower calls to the new format

chrome/test/chromedriver/chrome_launcher.cc

 // Copyright (c) 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/test/chromedriver/chrome_launcher.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 555 matching lines @@
       (*id)[i] = val + 'a';
     } else {
       (*id)[i] = 'a';
     }
   }
 }
 
 std::string GenerateExtensionId(const std::string& input) {
   uint8 hash[16];
   crypto::SHA256HashString(input, hash, sizeof(hash));
-  std::string output =
-      base::StringToLowerASCII(base::HexEncode(hash, sizeof(hash)));
+  std::string output = base::ToLowerASCII(base::HexEncode(hash, sizeof(hash)));
   ConvertHexadecimalToIDAlphabet(&output);
   return output;
 }
 
 Status GetExtensionBackgroundPage(const base::DictionaryValue* manifest,
                                   const std::string& id,
                                   std::string* bg_page) {
   std::string bg_page_name;
   bool persistent = true;
   manifest->GetBoolean("background.persistent", &persistent);
@@ skipping 255 matching lines @@
   // Write empty "First Run" file, otherwise Chrome will wipe the default
   // profile that was written.
   if (base::WriteFile(
           user_data_dir.Append(chrome::kFirstRunSentinel), "", 0) != 0) {
     return Status(kUnknownError, "failed to write first run file");
   }
   return Status(kOk);
 }
 
 }  // namespace internal