Don't compile windowed egl into gles2_conform_test_windowless

gpu/gles2_conform_support/gles2_conform_support.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.
 
 {
   'variables': {
     'chromium_code': 1,
     # These are defined here because we want to be able to compile them on
     # the buildbots without needed the OpenGL ES 2.0 conformance tests
     # which are not open source.
     'bootstrap_sources_native': [
       'native/main.cc',
     ],
    'conditions': [
-     ['OS=="linux"', {
+     ['OS=="linux" or OS=="win"', {
        'bootstrap_sources_native': [
          'native/egl_native.cc',
-         'native/egl_native_aura.cc',
-         'native/egl_native_x11.cc',
-       ],
-     }],
-     ['OS=="win"', {
-       'bootstrap_sources_native': [
-         'native/egl_native.cc',
-         'native/egl_native_win.cc',
        ],
      }],
    ],
 
   },
   'targets': [
     {
       # GN version: //gpu/gles2_conform_support/egl
       'target_name': 'egl_native',
       'type': 'static_library',
@@ skipping 86 matching lines @@
         'EGLAPI=',
         'EGLAPIENTRY=',
       ],
       'sources': [
         '<@(bootstrap_sources_native)',
         'gles2_conform_support.c'
       ],
     },
   ],
 }