Replace ToLower calls to the new format

chrome/browser/file_select_helper.cc

 // Copyright (c) 2012 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/file_select_helper.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 547 matching lines @@
   CleanUpOnRenderViewHostChange();
 }
 
 // static
 bool FileSelectHelper::IsAcceptTypeValid(const std::string& accept_type) {
   // TODO(raymes): This only does some basic checks, extend to test more cases.
   // A 1 character accept type will always be invalid (either a "." in the case
   // of an extension or a "/" in the case of a MIME type).
   std::string unused;
   if (accept_type.length() <= 1 ||
-      base::StringToLowerASCII(accept_type) != accept_type ||
+      base::ToLowerASCII(accept_type) != accept_type ||
       base::TrimWhitespaceASCII(accept_type, base::TRIM_ALL, &unused) !=
           base::TRIM_NONE) {
     return false;
   }
   return true;
 }