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

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

Index: masters/master.tryserver.chromium.linux/slaves.cfg
diff --git a/masters/master.tryserver.chromium.linux/slaves.cfg b/masters/master.tryserver.chromium.linux/slaves.cfg
index c3fdec1fc5c9a61f66f1b2006d7fce12c14ea936..88fd036dda830fc30f929686ea087b04e225e113 100644
--- a/masters/master.tryserver.chromium.linux/slaves.cfg
+++ b/masters/master.tryserver.chromium.linux/slaves.cfg
@@ -50,14 +50,19 @@ def linux():
     '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',
@@ -71,13 +76,6 @@ def linux():
     '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 = [
@@ -119,18 +117,6 @@ def linux():
       '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(
     {
@@ -144,24 +130,6 @@ def linux():
     } 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([
     {