Move NTDDI_VERSION define to common.gypi.

win8/metro_driver/metro_driver.gyp

 # Copyright (c) 2012 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.
 {
   'conditions': [
     ['OS=="win"', {
       'variables': {
         'chromium_code': 1,
       },
       'includes': [
         '../../build/win_precompile.gypi',
       ],
       'target_defaults': {
-        'defines': [
-          # This define is required to pull in the new Win8 interfaces from
-          # system headers like ShObjIdl.h
-          'NTDDI_VERSION=0x06020000',
-        ],
         'msvs_settings': {
             'VCLinkerTool': {
                 'AdditionalDependencies': [
                     'D2D1.lib',
                     'D3D11.lib',
                 ],
             },
         },
       },
       'targets': [
@@ skipping 65 matching lines @@
             'run_all_unittests.cc',
             'winrt_utils.cc',
             'winrt_utils.h',
             'winrt_utils_unittest.cc',
           ],
         },
       ],
     },],
   ],
 }