Improve the encoding/decoding to/from system encoding on Windows

runtime/bin/socket_win.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/builtin.h"
 #include "bin/eventhandler.h"
 #include "bin/file.h"
 #include "bin/lockers.h"
 #include "bin/log.h"
 #include "bin/socket.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
+#include "bin/utils_win.h"
+
 
 namespace dart {
 namespace bin {
 
 SocketAddress::SocketAddress(struct sockaddr* sockaddr) {
   ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
   RawAddr* raw = reinterpret_cast<RawAddr*>(sockaddr);
 
   // Clear the port before calling WSAAddressToString as WSAAddressToString
   // includes the port in the formatted string.
@@ skipping 324 matching lines @@
     SetLastError(error_code);
     *os_error = new OSError();
     return false;
   }
   return true;
 }
 
 
 bool Socket::ParseAddress(int type, const char* address, RawAddr* addr) {
   int result;
-  const wchar_t* system_address = StringUtils::Utf8ToWide(address);
+  const wchar_t* system_address = StringUtilsWin::Utf8ToWide(address);
   if (type == SocketAddress::TYPE_IPV4) {
     result = InetPton(AF_INET, system_address, &addr->in.sin_addr);
   } else {
     ASSERT(type == SocketAddress::TYPE_IPV6);
     result = InetPton(AF_INET6, system_address, &addr->in6.sin6_addr);
   }
   free(const_cast<wchar_t*>(system_address));
   return result == 1;
 }
 
@@ skipping 76 matching lines @@
     }
   }
   AddressList<InterfaceSocketAddress>* addresses =
       new AddressList<InterfaceSocketAddress>(count);
   intptr_t i = 0;
   for (IP_ADAPTER_ADDRESSES* a = addrs; a != NULL; a = a->Next) {
     for (IP_ADAPTER_UNICAST_ADDRESS* u = a->FirstUnicastAddress;
          u != NULL; u = u->Next) {
       addresses->SetAt(i, new InterfaceSocketAddress(
           u->Address.lpSockaddr,
-          StringUtils::WideToUtf8(a->FriendlyName),
+          StringUtilsWin::WideToUtf8(a->FriendlyName),
           a->Ipv6IfIndex));
       i++;
     }
   }
   free(addrs);
   return addresses;
 }
 
 
 intptr_t ServerSocket::CreateBindListen(const RawAddr& addr,
@@ skipping 238 matching lines @@
                     proto,
                     MCAST_LEAVE_GROUP,
                     reinterpret_cast<char *>(&mreq),
                     sizeof(mreq)) == 0;
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)