Fix include directories in Windows GN build.

build/secondary/third_party/leveldatabase/BUILD.gn

 # Copyright 2014 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.
 
 # Snappy is a compression library we use.
 # TODO(brettw) It's not clear why this needs to be parameterized.
 use_snappy = true
 
 defines = [ "LEVELDB_PLATFORM_CHROMIUM=1" ]
 
 config("leveldatabase_config") {
   include_dirs = [
     ".",
     "src",
     "src/include",
   ]
-  if (is_win) {
-    include_dirs += [ "src/port/win" ]

[Slava Chigrin, 2015/01/13 15:46:05]

See https://codereview.chromium.org/27089002/ . Due to that wrong include
directory some other parts of the system pick stdint.h from leveldatabase,
instead of system one. That caused many compilation errors on Windows.

-  }
 }
 
 static_library("leveldatabase") {
   sources = [
     "env_chromium.cc",
     "env_chromium.h",
     "env_idb.h",
     "port/port_chromium.cc",
     "port/port_chromium.h",
     "src/db/builder.cc",
@@ skipping 299 matching lines @@
     sources = [
       "src/db/write_batch_test.cc",
     ]
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     deps = [
       ":leveldb_testutil",
     ]
   }
 }