ozone: Add egltest platform

ui/ozone/ozone.gyp

 # Copyright 2013 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,
     'external_ozone_platforms': [],
     'external_ozone_platform_files': [],
     'external_ozone_platform_deps': [],
@@ skipping 79 matching lines @@
     ['<(ozone_platform_caca) == 1', {
       'includes': [
         'platform/caca/caca.gypi',
       ],
     }],
     ['<(ozone_platform_dri) == 1', {
       'includes': [
         'platform/dri/dri.gypi',
       ],
     }],
+    ['<(ozone_platform_egltest) == 1', {
+      'includes': [
+        'platform/egltest/egltest.gypi',
+      ],
+    }],
     ['<(ozone_platform_test) == 1', {
       'includes': [
         'platform/test/test.gypi',
       ],
     }],
   ],
 }