This moves all of the remaining 32-bit linux builders onto 64-bit hosts.

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 32 matching lines @@
   optional_builders += [
     'linux_arm',
     'linux_chromium_asan_variable',
     'linux_chromium_cast_variable',
     'linux_chromium_chromeos_asan_variable',
     'linux_chromium_chromeos_compile_rel_ng',
     'linux_chromium_chromeos_dbg_ng',
     'linux_chromium_chromeos_msan_rel_ng',
     'linux_chromium_chromeos_variable',
     'linux_chromium_chromeos_variable_chrome',
+    'linux_chromium_compile_dbg_32_ng',
     'linux_chromium_compile_rel_ng',
     'linux_chromium_dbg_ng',
+    'linux_chromium_dbg_32_ng',
     'linux_chromium_gn_chromeos_variable',
     'linux_chromium_gn_upload',
     'linux_chromium_msan_rel_ng',
     'linux_chromium_tsan_rel_ng',
     'linux_chromium_practice_rel_ng',
     'linux_chromium_variable',
+    'linux_chromium_variable_32',
+    'linux_chromium_variable_32_chrome',
+    'linux_chromium_variable_32_clobber',
     'linux_chromium_variable_chrome',
     'linux_chromium_variable_clobber',
     'linux_chromium_webkit_asan_variable',
     'linux_chromium_webkit_leak_variable',
     'linux_chromium_webkit_msan_variable',
     'linux_chromium_webkit_variable',
     'linux_ecs_ozone',
     'linux_nacl_sdk',
     'linux_nacl_sdk_build',
     'linux_optional_gpu_tests_rel',
     'linux_site_isolation',
   ]
 
-  optional_32_slaves = [897]
-  optional_32_builders = [
-    'linux_chromium_variable_32',
-    'linux_chromium_variable_32_chrome',
-    'linux_chromium_variable_32_clobber',
-  ]
-
   # Super beefy machines.
   optional_highmem_slaves = [904, 905]
   optional_highmem_builders = [
     'linux_upload_clang',
     'linux_chromium_cfi_rel_ng',
   ]
 
   # Set up normal slaves.
   result = []
   for i, slave in enumerate(cq_slaves):
@@ skipping 21 matching lines @@
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': optional_highmem_builders,
       'hostname': 'slave%d-c4' % slave,
       'pool': 'linux_optional_highmem',
     })
 
-  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]
-  result.extend(
-    {
-      'master': 'TryServerChromiumLinux',
-      'os': 'linux',
-      'version': 'precise',
-      'bits': '32',
-      'builder': [
-          'linux_chromium_compile_dbg_32_ng',
-          'linux_chromium_dbg_32_ng',
-      ],
-      'hostname': 'vm%d-m4' % i,
-      'pool': 'linux_32',
-    } for i in linux_32_slaves
-  )
-
   # Bot for linux_chromium_browser_side_navigation_rel.
   result.extend([
     {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': ['linux_chromium_browser_side_navigation_rel'],
       'hostname': 'slave914-c4',
       'pool': 'linux_chromium_browser_side_navigation_rel',
     }
   ])
 
   return result
 
 
 slaves = linux()