Move WindowImpl to gfx so I can use it there for canvas unit tests....

gfx/gfx.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 95 matching lines @@
       ],
       'conditions': [
         ['OS=="win"', {
           'sources': [
             'gdi_util.cc',
             'gdi_util.h',
             'icon_util.cc',
             'icon_util.h',
             'native_theme_win.cc',
             'native_theme_win.h',
+            'window_impl.cc',
+            'window_impl.h'
           ],
         }],
         ['OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
           'dependencies': [
             # font_gtk.cc uses fontconfig.
             # TODO(evanm): I think this is wrong; it should just use GTK.
             '../build/linux/system.gyp:fontconfig',
           ],
           'sources': [
             'font_skia.cc',
             'gtk_native_view_id_manager.cc',
             'gtk_native_view_id_manager.h',
             'gtk_util.cc',
             'gtk_util.h',
             'native_widget_types_gtk.cc',
           ],
         }],
       ],
     },    
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: