Disable the embedded search field trials for users with themes.

chrome/chrome_tests_unit.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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1340 matching lines @@
         'browser/ui/intents/web_intent_inline_disposition_delegate_unittest.cc',
         'browser/ui/intents/web_intent_picker_model_unittest.cc',
         'browser/ui/intents/web_intent_picker_unittest.cc',
         'browser/ui/login/login_prompt_unittest.cc',
         'browser/ui/omnibox/omnibox_edit_unittest.cc',
         'browser/ui/omnibox/omnibox_view_unittest.cc',
         'browser/ui/panels/display_settings_provider_win_unittest.cc',
         'browser/ui/panels/panel_mouse_watcher_unittest.cc',
         'browser/ui/search_engines/keyword_editor_controller_unittest.cc',
         'browser/ui/search/search_delegate_unittest.cc',
+        'browser/ui/search/search_unittest.cc',
         'browser/ui/sync/one_click_signin_helper_unittest.cc',
         'browser/ui/tab_contents/tab_contents_iterator_unittest.cc',
         'browser/ui/tabs/dock_info_unittest.cc',
         'browser/ui/tabs/pinned_tab_codec_unittest.cc',
         'browser/ui/tabs/pinned_tab_service_unittest.cc',
         'browser/ui/tabs/pinned_tab_test_utils.cc',
         'browser/ui/tabs/tab_menu_model_unittest.cc',
         'browser/ui/tabs/tab_strip_model_unittest.cc',
         'browser/ui/tabs/test_tab_strip_model_delegate.cc',
         'browser/ui/tabs/test_tab_strip_model_delegate.h',
@@ skipping 943 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }