Remove "nacl_defines" from the GYP build.

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 3034 matching lines @@
 
             # These files are generated by GRIT.
             '<(grit_out_dir)/grit/component_extension_resources_map.cc',
             '<(grit_out_dir)/grit/theme_resources_map.cc',
             '<(SHARED_INTERMEDIATE_DIR)/ui/resources/grit/ui_resources_map.cc',
 
             # This file is generated by
             # chrome/browser/metrics/variations/generate_resources_map.py
             '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/metrics/variations/generated_resources_map.cc',
           ],
-          'defines': [
-            '<@(nacl_defines)',
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              '<@(nacl_defines)',
-            ],
-          },
         }, {  # OS == "ios"
           'dependencies': [
             '../net/net.gyp:net',
           ],
           # A few sources had been brought up for iOS before the decision not to
           # use chrome/ for iOS long-term. Keep building them to prevent iOS
           # regressions until they have been componentized.
           'sources': [
             '<@(chrome_browser_ios_sources)',
             '<@(chrome_browser_google_sources)',
@@ skipping 630 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }