[Ozone] Update GYP and GN to include a DRM platform

build/filename_rules.gypi

 # 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.
 
 # This gypi file defines the patterns used for determining whether a
 # file is excluded from the build on a given platform.  It is
 # included by common.gypi for chromium_code.
 
 {
   'target_conditions': [
@@ skipping 88 matching lines @@
     ['<(use_ozone)==0 or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_ozone(_browsertest|_unittest)?\\.(h|cc)$'],
                     ['exclude', '(^|/)ozone/'],
       ]
     }],
     ['<(use_ozone_evdev)==0 or >(nacl_untrusted_build)==1', {
       'sources/': [ ['exclude', '_evdev(_browsertest|_unittest)?\\.(h|cc)$'],
                     ['exclude', '(^|/)evdev/'],
       ]
     }],
-    ['<(ozone_platform_dri)==0 or >(nacl_untrusted_build)==1', {
-      'sources/': [ ['exclude', '_dri(_browsertest|_unittest)?\\.(h|cc)$'],
-                    ['exclude', '(^|/)dri/'],
-      ]
-    }],
     ['<(use_pango)==0', {
       'sources/': [ ['exclude', '(^|_)pango(_util|_browsertest|_unittest)?\\.(h|cc)$'], ],
     }],
   ]
 }