Mingw support for Windows LevelDB port

src/leveldb/util/env_posix.cc

@@ -1,6 +1,7 @@
 // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
+#if !defined(LEVELDB_PLATFORM_WINDOWS)
 
 #include <deque>
 #include <set>
@@ -696,3 +697,5 @@ Env* Env::Default() {
 }
 
 }  // namespace leveldb
+
+#endif