Revised CL for customisable logging (replacing printfs).

runtime/bin/utils_win.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 "bin/utils.h"
+#include "bin/log.h"
 
 static void FormatMessageIntoBuffer(DWORD code,
                                     char* buffer,
                                     int buffer_length) {
   DWORD message_size =
       FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                     NULL,
                     code,
                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                     buffer,
                     buffer_length,
                     NULL);
   if (message_size == 0) {
     if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
-      fprintf(stderr, "FormatMessage failed %d\n", GetLastError());
+      Log::PrintErr("FormatMessage failed %d\n", GetLastError());
     }
     snprintf(buffer, buffer_length, "OS Error %d", code);
   }
   buffer[buffer_length - 1] = '\0';
 }
 
 
 OSError::OSError() : sub_system_(kSystem), code_(0), message_(NULL) {
   set_code(GetLastError());
 
@@ skipping 39 matching lines @@
   return ansi;
 }
 
 const char* StringUtils::Utf8ToSystemString(const char* utf8) {
   return const_cast<const char*>(Utf8ToSystemString(const_cast<char*>(utf8)));
 }
 
 const char* StringUtils::SystemStringToUtf8(const char* str) {
   return const_cast<const char*>(Utf8ToSystemString(const_cast<char*>(str)));
 }