Adding optional variable 32 bit linux builder

masters/master.tryserver.chromium.linux/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 def linux():
   chromeos_boards = ('x86-generic', 'amd64-generic', 'daisy')
@@ skipping 49 matching lines @@
     'linux_chromium_variable',
     'linux_deterministic',
     'linux_ecs_ozone',
     'linux_nacl_sdk',
     'linux_nacl_sdk_build',
     'linux_optional_gpu_tests_rel',
     'linux_site_isolation',
     'linux_valgrind',
   ]
 
+  optional_32_slaves = [897]
+  optional_32_builders = [
+    'linux_chromium_variable_32',
+  ]
+
   # Set up normal slaves.
   result = []
   for i, slave in enumerate(cq_slaves):
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': cq_builders,
       'preferred_builder': cq_builders[i % len(cq_builders)],
@@ skipping 14 matching lines @@
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': 'linux_chromium_cfi_rel_ng',
       'hostname': 'slave%d-c4' % slave,  # Super beefy machines.
       'pool': 'linux_chromium_cfi_rel_ng',
     })
 
+  result.extend(
+    {
+      'master': 'TryServerChromiumLinux',
+      'os': 'linux',
+      'version': 'precise',
+      'bits': '32',
+      'builder': optional_32_builders,
+      'hostname': 'vm%d-m4' % i,
+      'pool': 'linux_optional_32',
+    } for i in optional_32_slaves
+  )
+
   linux_full_bisect_builder_slaves = [747, 748]
   result.extend(
     {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': 'linux_full_bisect_builder',
       'hostname': 'slave%d-c4' % i,
       'pool': 'linux_full_bisect_builder',
     } for i in linux_full_bisect_builder_slaves
   )
 
   linux_32_slaves = [117, 162, 163, 188, 193, 196, 198, 201, 203,
                      211, 227, 260, 338, 786, 787, 788, 804, 822,
-                     824, 825, 826, 827, 828, 897]
+                     824, 825, 826, 827, 828]
   result.extend(
     {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '32',
       'builder': [
           'linux_chromium_archive_rel_32_ng',
           'linux_chromium_compile_dbg_32_ng',
           'linux_chromium_dbg_32_ng',
@@ skipping 13 matching lines @@
       'builder': ['linux_chromium_browser_side_navigation_rel'],
       'hostname': 'slave914-c4',
       'pool': 'linux_chromium_browser_side_navigation_rel',
     }
   ])
 
   return result
 
 
 slaves = linux()