Remove NaCl SDK bots from top-level PRESUBMIT.py

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 1366 matching lines @@
   if all(re.search('\.(m|mm)$|(^|[/_])mac[/_.]', f) for f in files):
     return GetDefaultTryConfigs(['mac', 'mac_rel'])
   if all(re.search('(^|[/_])win[/_.]', f) for f in files):
     return GetDefaultTryConfigs(['win', 'win_rel'])
   if all(re.search('(^|[/_])android[/_.]', f) for f in files):
     return GetDefaultTryConfigs([
         'android_aosp',
         'android_clang_dbg',
         'android_dbg',
     ])
-  if all(re.search('^native_client_sdk', f) for f in files):
-    return GetDefaultTryConfigs([
-        'linux_nacl_sdk',
-        'mac_nacl_sdk',
-        'win_nacl_sdk',
-    ])
   if all(re.search('[/_]ios[/_.]', f) for f in files):
     return GetDefaultTryConfigs(['ios_rel_device', 'ios_dbg_simulator'])
 
   trybots = GetDefaultTryConfigs([
       'android_clang_dbg',
       'android_dbg',
       'ios_dbg_simulator',
       'ios_rel_device',
       'linux_aura',
       'linux_asan',
@@ skipping 22 matching lines @@
     trybots.extend(GetDefaultTryConfigs(['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)):
     trybots.extend(GetDefaultTryConfigs(['android_aosp']))
 
   return trybots