Fix some problems with machine level install.

base/file_util_win.cc

 // Copyright (c) 2006-2008 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/file_util.h"
 
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <time.h>
@@ skipping 347 matching lines @@
     i_shell_link->Release();
     return false;
   }
 
   HRESULT result = i_persist_file->Save(destination, TRUE);
   i_persist_file->Release();
   i_shell_link->Release();
   return SUCCEEDED(result);
 }
 
+bool IsDirectoryEmpty(const std::wstring& dir_path) {
+  FileEnumerator files(dir_path, false, FileEnumerator::FILES_AND_DIRECTORIES);
+  if (files.Next().empty())
+    return true;
+  return false;
+}
+
 bool GetTempDir(std::wstring* path) {
   wchar_t temp_path[MAX_PATH + 1];
   DWORD path_len = ::GetTempPath(MAX_PATH, temp_path);
   if (path_len >= MAX_PATH || path_len <= 0)
     return false;
   path->assign(temp_path);
   TrimTrailingSeparator(path);
   return true;
 }
 
@@ skipping 278 matching lines @@
       return (file_type_ & FileEnumerator::DIRECTORIES) ? cur_file : Next();
     }
 
     if ((file_type_ & FileEnumerator::DIRECTORIES) == 0)
       return Next();
   }
   return (file_type_ & FileEnumerator::FILES) ? cur_file : Next();
 }
 
 }  // namespace file_util