Put irt and untrusted TC dependencies behind a flag.

chrome/nacl.gypi

 # Copyright (c) 2011 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.
 
 {
   'include': [
     '../native_client/build/untrusted.gypi',
   ],
   'target_defaults': {
     'variables': {
@@ skipping 52 matching lines @@
         {
           'target_name': 'nacl',
           'type': 'static_library',
           'variables': {
             'nacl_target': 1,
           },
           'dependencies': [
             'chrome_resources.gyp:chrome_resources',
             'chrome_resources.gyp:chrome_strings',
             'common',
-            '../ppapi/native_client/native_client.gyp:nacl_irt',
             '../webkit/support/webkit_support.gyp:glue',
             '../ppapi/native_client/src/trusted/plugin/plugin.gyp:ppGoogleNaClPluginChrome',
             '../native_client/src/trusted/service_runtime/service_runtime.gyp:sel',
             '../native_client/src/trusted/platform_qualify/platform_qualify.gyp:platform_qual_lib',
           ],
+          'conditions': [
+            ['disable_nacl_untrusted!=1', {
+              'dependencies': [
+                '../ppapi/native_client/native_client.gyp:nacl_irt',
+              ],
+            }],
+          ],
           'direct_dependent_settings': {
             'defines': [
               'NACL_BLOCK_SHIFT=5',
               'NACL_BLOCK_SIZE=32',
               '<@(nacl_defines)',
             ],
           },
         },
       ],
       'conditions': [
@@ skipping 116 matching lines @@
               'target_name': 'nacl_win64',
               'type': 'none',
               'sources': [],
             },
           ],
         }],
       ],
     }],
   ],
 }