Implemented mid-level Negotiate protocol for Posix.

base/native_library_win.cc

 // Copyright (c) 2009 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 "base/native_library.h"
 
 #include <windows.h>
 
 #include "base/file_util.h"
 #include "base/string_util.h"
+#include "base/win_util.h"
 
 namespace base {
 
 // static
 NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
   // Switch the current directory to the library directory as the library
   // may have dependencies on DLLs in this directory.
   bool restore_directory = false;
   FilePath current_directory;
   if (file_util::GetCurrentDirectory(&current_directory)) {
@@ skipping 20 matching lines @@
 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
                                           const char* name) {
   return GetProcAddress(library, name);
 }
 
 // static
 string16 GetNativeLibraryName(const string16& name) {
   return name + ASCIIToUTF16(".dll");
 }
 
+string16 GetLibraryErrorMessage() {
+  DWORD last_err = GetLastError();
+  string16 err_message = win_util::FormatMessage(last_err);
+  return err_message;
+}
+
 }  // namespace base