Use StringPiece for UTF string conversions.

net/dns/dns_config_service_win.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 "net/dns/dns_config_service_win.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 135 matching lines @@
 
   // Otherwise try to convert it from IDN to punycode.
   const int kInitialBufferSize = 256;
   url_canon::RawCanonOutputT<char16, kInitialBufferSize> punycode;
   if (!url_canon::IDNToASCII(widestr.data(), widestr.length(), &punycode))
     return false;
 
   // |punycode_output| should now be ASCII; convert it to a std::string.
   // (We could use UTF16ToASCII() instead, but that requires an extra string
   // copy. Since ASCII is a subset of UTF8 the following is equivalent).
-  bool success = UTF16ToUTF8(punycode.data(), punycode.length(), domain);
+  bool success = base::UTF16ToUTF8(
+      base::StringPiece16(punycode.data(), punycode.length()), domain);
   DCHECK(success);
   DCHECK(IsStringASCII(*domain));
   return success && !domain->empty();
 }
 
 bool ReadDevolutionSetting(const RegistryReader& reader,
                            DnsSystemSettings::DevolutionSetting* setting) {
   return reader.ReadDword(L"UseDomainNameDevolution", &setting->enabled) &&
          reader.ReadDword(L"DomainNameDevolutionLevel", &setting->level);
 }
@@ skipping 591 matching lines @@
 }
 
 }  // namespace internal
 
 // static
 scoped_ptr<DnsConfigService> DnsConfigService::CreateSystemService() {
   return scoped_ptr<DnsConfigService>(new internal::DnsConfigServiceWin());
 }
 
 }  // namespace net