Stop building ui_unittests target.

PRESUBMIT.py

 # 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
 
@@ skipping 1593 matching lines @@
       'cros_x86': ['defaulttests'],
       'ios_dbg_simulator': [
           'compile',
           'base_unittests',
           'content_unittests',
           'crypto_unittests',
           'url_unittests',
           'net_unittests',
           'sql_unittests',
           'ui_base_unittests',
-          'ui_unittests',
       ],
       'ios_rel_device': ['compile'],
       'ios_rel_device_ninja': ['compile'],
       'mac_asan': ['compile'],
       #TODO(stip): Change the name of this builder to reflect that it's release.
       'linux_gtk': standard_tests,
       'linux_chromeos_asan': ['compile'],
       'linux_chromium_chromeos_clang_dbg': ['defaulttests'],
       'linux_chromium_chromeos_rel': ['defaulttests'],
       'linux_chromium_compile_dbg': ['defaulttests'],
@@ skipping 122 matching lines @@
     builders.extend(['cros_x86'])
 
   # The AOSP bot doesn't build the chrome/ layer, so ignore any changes to it
   # unless they're .gyp(i) files as changes to those files can break the gyp
   # step on that bot.
   if (not all(re.search('^chrome', f) for f in files) or
       any(re.search('\.gypi?$', f) for f in files)):
     builders.extend(['android_aosp'])
 
   return GetDefaultTryConfigs(builders)