Turn off ash and aura by default on linux blink bots.

masters/master.tryserver.chromium/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # 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.
 
 # READ THIS:
 # See http://dev.chromium.org/developers/testing/chromium-build-infrastructure
 
 import socket
@@ skipping 1358 matching lines @@
   'slavebuilddir': 'linux_layout',
   'factory': m_chromium_linux.ChromiumFactory(
       slave_type='Trybot',
       target='Release',
       tests=blink_tests,
       options=['--build-tool=ninja', '--compiler=goma', 'all_webkit'],
       factory_properties={
         'archive_webkit_results': ActiveMaster.is_production_host,
         'blink_config': 'blink',
         'gclient_env': {
+          'GYP_DEFINES': 'use_ash=0 use_aura=0',
           'GYP_GENERATORS': 'ninja',
         },
       }),
 }
 
 b_linux_layout_rel_32 = {
   'name': 'linux_layout_rel_32',
   # Reuse the directory.
   'slavebuilddir': 'linux_layout',
   'factory': m_chromium_linux.ChromiumFactory(
       slave_type='Trybot',
       target='Release',
       tests=blink_tests,
       options=['--build-tool=ninja', '--compiler=goma', 'all_webkit'],
       factory_properties={
         'archive_webkit_results': ActiveMaster.is_production_host,
         'blink_config': 'blink',
         'gclient_env': {
+          'GYP_DEFINES': 'use_ash=0 use_aura=0',
           'GYP_GENERATORS': 'ninja',
         },
       }),
 }
 
 asan_gyp = ('asan=1 linux_use_tcmalloc=0 '
             'release_extra_cflags="-g -O1 -fno-inline-functions -fno-inline"')
 
 b_linux_layout_asan = {
   'name': 'linux_layout_asan',
   # Reuse the directory.
   'slavebuilddir': 'linux_layout',
   'factory': m_chromium_linux.ChromiumFactory(
       slave_type='Trybot',
       target='Release',
       tests=blink_tests,
       options=['--build-tool=ninja', '--compiler=goma', 'all_webkit'],
       factory_properties={
         'additional_expectations': [
             ['webkit', 'tools', 'layout_tests', 'test_expectations_asan.txt' ],
         ],
         'archive_webkit_results': ActiveMaster.is_production_host,
         'asan': True,
         'blink_config': 'blink',
         'gclient_env': {
-          'GYP_DEFINES': asan_gyp,
+          'GYP_DEFINES': asan_gyp + ' use_ash=0 use_aura=0',
           'GYP_GENERATORS': 'ninja',
         },
         'time_out_ms': '18000',
       }),
 }
 
 b_mac_layout = {
   'name': 'mac_layout',
   'slavebuilddir': 'mac_layout',
   'factory': m_chromium_mac_ninja.ChromiumFactory(
@@ skipping 912 matching lines @@
 c['projectURL'] = 'http://dev.chromium.org/developers/testing/try-server-usage'
 
 # Buildbot master url:
 if ActiveMaster.is_production_host:
   c['buildbotURL'] = 'http://build.chromium.org/p/tryserver.chromium/'
 else:
   c['buildbotURL'] = 'http://%s:%d/' % (
       socket.getfqdn(), ActiveMaster.master_port)
 
 # vi: set ts=4 sts=2 sw=2 et: