Add nacl sdk builders to default try list.

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 1277 matching lines @@
           'components_unittests',
           'dbus_unittests',
           'device_unittests',
           'events_unittests',
           'google_apis_unittests',
           'sandbox_linux_unittests',
       ],
       'linux_chromium_dbg': ['defaulttests'],
       'linux_chromium_rel': ['defaulttests'],
       'linux_clang': ['compile'],
+      'linux_nacl_sdk_build': ['compile'],
       'linux_rel': standard_tests + [
           'cc_unittests',
           'chromedriver_unittests',
           'components_unittests',
           'google_apis_unittests',
           'nacl_integration',
           'remoting_unittests',
           'sandbox_linux_unittests',
           'sync_integration_tests',
       ],
       'mac': ['compile'],
       'mac_chromium_dbg': ['defaulttests'],
       'mac_chromium_rel': ['defaulttests'],
+      'mac_nacl_sdk_build': ['compile'],
       'mac_rel': standard_tests + [
           'app_list_unittests',
           'cc_unittests',
           'chromedriver_unittests',
           'components_unittests',
           'google_apis_unittests',
           'message_center_unittests',
           'nacl_integration',
           'remoting_unittests',
           'sync_integration_tests',
           'telemetry_unittests',
       ],
       'win': ['compile'],
+      'win_nacl_sdk_build': ['compile'],
       'win_rel': standard_tests + [
           'app_list_unittests',
           'ash_unittests',
           'aura_unittests',
           'cc_unittests',
           'chrome_elf_unittests',
           'chromedriver_unittests',
           'components_unittests',
           'compositor_unittests',
           'events_unittests',
@@ skipping 81 matching lines @@
 
   trybots = GetDefaultTryConfigs([
       'android_clang_dbg',
       'android_dbg',
       'ios_dbg_simulator',
       'ios_rel_device',
       'linux_aura',
       'linux_asan',
       'linux_chromeos',
       'linux_clang',
+      'linux_nacl_sdk_build',
       'linux_rel',
       'mac',
+      'mac_nacl_sdk_build',
       'mac_rel',
       'win',
+      'win_nacl_sdk_build',
       'win_rel',
       'win_x64_rel',
   ])
 
   # Match things like path/aura/file.cc and path/file_aura.cc.
   # Same for chromeos.
   if any(re.search('[/_](aura|chromeos)', f) for f in files):
     trybots.extend(GetDefaultTryConfigs([
         'linux_chromeos_asan', 'linux_chromeos_clang']))
 
@@ skipping 16 matching lines @@
   # problems, only enable for a small percentage of try runs.
   if random.random() < 0.01:
     trybots.extend(GetDefaultTryConfigs([
         'linux_chromium_dbg',
         'linux_chromium_rel',
         'mac_chromium_dbg',
         'mac_chromium_rel',
     ]))
 
   return trybots