Update mb_config.pyl for linux_layout_tests_layout_ng try bot.

tools/mb/mb_config.pyl

 # Copyright 2015 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.
 
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 562 matching lines @@
 
       # This is intentionally a release_bot and not a release_trybot;
       # enabling DCHECKs seems to cause flaky failures that don't show up
       # on the continuous builder.
       'linux_chromium_msan_rel_ng': 'msan_release_bot',
 
       'linux_chromium_rel_ng': 'gpu_tests_release_trybot',
       'linux_chromium_tsan_rel_ng': 'tsan_disable_nacl_release_trybot',
       'linux_chromium_ubsan_rel_ng': 'ubsan_vptr_release_trybot',
 
-      # This is 'release_bot' rather than 'release_trybot' because
+      # These are 'release_bot' rather than 'release_trybot' because
       # 'release_trybot' includes 'dcheck_always_on', which might cause
       # some layout test results to be different than for normal release
       # builds (and we only store baselines for release builds).
       'linux_layout_tests_slimming_paint_v2': 'release_bot',
+      'linux_layout_tests_layout_ng': 'release_bot',
 
       'linux_nacl_sdk_build': 'release_bot',
       'linux_nacl_sdk': 'release_bot',
       'linux_optional_gpu_tests_rel': 'gpu_fyi_tests_release_trybot',
       'linux_site_isolation': 'release_trybot',
       'linux_upload_clang': 'release_bot',
     },
 
     'tryserver.chromium.mac': {
       'ios-device': 'ios',
@@ skipping 1337 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }