Use unicode versions of process APIs on Windows. Additionally,

runtime/bin/utils_macos.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 <errno.h>
 #include <netdb.h>
 
 #include "bin/utils.h"
 #include "platform/assert.h"
 
@@ skipping 44 matching lines @@
 
 char* StringUtils::WideToUtf8(wchar_t* str) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 const char* StringUtils::WideToUtf8(const wchar_t* str) {
   UNIMPLEMENTED();
   return NULL;
 }
+
+wchar_t** ShellUtils::GetUnicodeArgv(int* argc) {
+  return NULL;
+}
+
+void ShellUtils::FreeUnicodeArgv(wchar_t** argv) {
+}