Remove "nacl_defines" from the GYP build.

chrome/chrome_browser_chromeos.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.
 
 {
   'variables': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 1140 matching lines @@
         '../ui/resources/ui_resources.gyp:ui_resources',
         '../ui/strings/ui_strings.gyp:ui_strings',
         '../ui/surface/surface.gyp:surface',
         '../ui/views/controls/webview/webview.gyp:webview',
         '../ui/views/controls/webview/webview.gyp:webview',
         '../ui/web_dialogs/web_dialogs.gyp:web_dialogs',
         '../url/url.gyp:url_lib',
         '../v8/tools/gyp/v8.gyp:v8',
         'chrome_resources.gyp:chrome_strings',
       ],
-      'defines': [
-        '<@(nacl_defines)',
-      ],
-      'direct_dependent_settings': {
-        'defines': [
-          '<@(nacl_defines)',
-        ],
-      },
       'export_dependent_settings': [
         'browser/extensions/api/api_registration.gyp:chrome_api_registration',
         'common/extensions/api/api.gyp:chrome_api',
         '../sync/sync.gyp:sync',
       ],
       'include_dirs': [
         # breakpad_linux.cc uses generated file_version_info_linux.h.
         '<(SHARED_INTERMEDIATE_DIR)',
         '../breakpad/src',
       ],
@@ skipping 114 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }