Put irt and untrusted TC dependencies behind a flag.

chrome/chrome_tests.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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 802 matching lines @@
         'test/ui/named_interface_uitest.cc',
         'test/ui/npapi_uitest.cc',
         'test/ui/ppapi_uitest.cc',
         'test/ui/sandbox_uitests.cc',
         '../content/browser/appcache/appcache_ui_test.cc',
         '../content/browser/in_process_webkit/dom_storage_uitest.cc',
         '../content/browser/renderer_host/resource_dispatcher_host_uitest.cc',
         '../content/worker/test/worker_uitest.cc',
       ],
       'conditions': [
-        ['disable_nacl!=1', {
+        ['disable_nacl!=1 and disable_nacl_untrusted!=1', {
           'dependencies': [
             '../ppapi/ppapi_untrusted.gyp:ppapi_nacl_tests',
           ],
         }],
         ['target_arch!="arm"', {
           'dependencies': [
             '../webkit/webkit.gyp:copy_npapi_test_plugin',
           ],
         }],
         ['toolkit_uses_gtk == 1', {
@@ skipping 3490 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }