Convert ui_base_unittests to run exclusively on Swarming

ui/base/ui_base_unittests.isolate

 # Copyright (c) 2014 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.
 {
   'conditions': [
     ['use_x11==0', {
       'variables': {
         'command': [
           '../../testing/test_env.py',
           '<(PRODUCT_DIR)/ui_base_unittests<(EXECUTABLE_SUFFIX)',
@@ skipping 61 matching lines @@
         'files': [
           '<(PRODUCT_DIR)/osmesa.dll',
         ],
       },
     }],
     ['OS=="mac" and asan==1 and fastbuild==0', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/osmesa.so.dSYM/',
           '<(PRODUCT_DIR)/ui_base_unittests.dSYM/',
-          '<(PRODUCT_DIR)/ui_unittests Framework.framework.dSYM/',
         ],
       },
     }],
   ],
   'includes': [
     '../../base/base.isolate',
   ],
 }