Use the win32 device scale factor in Chrome ASH on Windows.

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': [
@@ skipping 56 matching lines @@
           'dependencies': [
             '../../base/base.gyp:base',
             '../../chrome/common_constants.gyp:common_constants',
             '../../chrome/chrome.gyp:installer_util',
             '../../crypto/crypto.gyp:crypto',
             '../../google_update/google_update.gyp:google_update',
             '../../ipc/ipc.gyp:ipc',
             '../../sandbox/sandbox.gyp:sandbox',
             '../../ui/metro_viewer/metro_viewer.gyp:metro_viewer_messages',
             '../../ui/gfx/gfx.gyp:gfx',
+            '../../ui/gfx/gfx.gyp:gfx_geometry',
             '../../url/url.gyp:url_lib',
             'metro_driver_version_resources',
           ],
           'sources': [
             'display_properties.cc',
             'display_properties.h',
             'metro_driver.cc',
             'metro_driver.h',
             'metro_driver_win7.cc',
             'stdafx.h',
@@ skipping 68 matching lines @@
             'run_all_unittests.cc',
             'winrt_utils.cc',
             'winrt_utils.h',
             'winrt_utils_unittest.cc',
           ],
         },
       ],
     },],
   ],
 }