Use FormatMessageW for Windows error messages to handle internationalized messages correctly.

runtime/bin/main.cc

 // Copyright (c) 2012, 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 <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 239 matching lines @@
 
 // Convert all the arguments to UTF8. On Windows, the arguments are
 // encoded in the current code page and not UTF8.
 //
 // Returns true if the arguments are converted. In that case
 // each of the arguments need to be deallocated using free.
 static bool Utf8ConvertArgv(int argc, char** argv) {
   bool result = false;
   for (int i = 0; i < argc; i++) {
     char* arg = argv[i];
-    argv[i] = StringUtils::SystemStringToUtf8(arg);
+    argv[i] = StringUtils::ConsoleStringToUtf8(arg);
     if (i == 0) {
       result = argv[i] != arg;
     } else {
       ASSERT(result == (argv[i] != arg));
     }
   }
   return result;
 }
 
 
@@ skipping 518 matching lines @@
   Dart_ShutdownIsolate();
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
   // Free copied argument strings if converted.
   if (argv_converted) {
     for (int i = 0; i < argc; i++) free(argv[i]);
   }
 
   return 0;
 }