Infra side changes to add a 32 bit Windows 7 bot.

scripts/slave/recipes/chromium.expected/full_chromium_win_Win_Builder.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\kill_processes.py"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "taskkill"
   },
@@ skipping 155 matching lines @@
       "@@@STEP_LOG_LINE@json.output@  \"Vista Tests (1)\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"gtest_tests\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"swarming\": {@@@",
       "@@@STEP_LOG_LINE@json.output@          \"can_use_on_swarming_builders\": true@@@",
       "@@@STEP_LOG_LINE@json.output@        }, @@@",
       "@@@STEP_LOG_LINE@json.output@        \"test\": \"browser_tests\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"Win7 (32) Tests\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"gtest_tests\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"swarming\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"can_use_on_swarming_builders\": true@@@",
+      "@@@STEP_LOG_LINE@json.output@        }, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"test\": \"browser_tests\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"Win7 Tests (1)\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"gtest_tests\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"swarming\": {@@@",
       "@@@STEP_LOG_LINE@json.output@          \"can_use_on_swarming_builders\": true@@@",
       "@@@STEP_LOG_LINE@json.output@        }, @@@",
       "@@@STEP_LOG_LINE@json.output@        \"test\": \"browser_tests\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
@@ skipping 146 matching lines @@
     "~followup_annotations": [
       "@@@STEP_TEXT@Vista Tests (1)@@@"
     ]
   },
   {
     "cmd": [],
     "cwd": "[SLAVE_BUILD]",
     "name": "trigger (2)",
     "trigger_specs": [
       {
+        "builder_name": "Win7 (32) Tests",
+        "properties": {
+          "parent_got_angle_revision": "fac9503c46405f77757b9a728eb85b8d7bc6080c",
+          "parent_got_angle_revision_cp": "refs/heads/master@{#297276}",
+          "parent_got_nacl_revision": "d998e125e8253980d76e269b7982aeeefc1b9b50",
+          "parent_got_nacl_revision_cp": "refs/heads/master@{#274981}",
+          "parent_got_revision": "f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9",
+          "parent_got_revision_cp": "refs/heads/master@{#170242}",
+          "parent_got_swarming_client_revision": "a0ee5d99f1d4b38ddaa4c759c837980b63b99566",
+          "parent_got_swarming_client_revision_cp": "refs/heads/master@{#276089}",
+          "parent_got_v8_revision": "801ada225ddc271c132c3a35f03975671d43e399",
+          "parent_got_v8_revision_cp": "refs/heads/master@{#43426}",
+          "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
+          "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
+        }
+      }
+    ],
+    "~followup_annotations": [
+      "@@@STEP_TEXT@Win7 (32) Tests@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "trigger (3)",
+    "trigger_specs": [
+      {
         "builder_name": "Win7 Tests (1)",
         "properties": {
           "parent_got_angle_revision": "fac9503c46405f77757b9a728eb85b8d7bc6080c",
           "parent_got_angle_revision_cp": "refs/heads/master@{#297276}",
           "parent_got_nacl_revision": "d998e125e8253980d76e269b7982aeeefc1b9b50",
           "parent_got_nacl_revision_cp": "refs/heads/master@{#274981}",
           "parent_got_revision": "f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9",
           "parent_got_revision_cp": "refs/heads/master@{#170242}",
           "parent_got_swarming_client_revision": "a0ee5d99f1d4b38ddaa4c759c837980b63b99566",
           "parent_got_swarming_client_revision_cp": "refs/heads/master@{#276089}",
           "parent_got_v8_revision": "801ada225ddc271c132c3a35f03975671d43e399",
           "parent_got_v8_revision_cp": "refs/heads/master@{#43426}",
           "parent_got_webrtc_revision": "0f90628433546e61d9268596da93418c623137f4",
           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
       }
     ],
     "~followup_annotations": [
       "@@@STEP_TEXT@Win7 Tests (1)@@@"
     ]
   },
   {
     "cmd": [],
     "cwd": "[SLAVE_BUILD]",
-    "name": "trigger (3)",
+    "name": "trigger (4)",
     "trigger_specs": [
       {
         "builder_name": "XP Tests (1)",
         "properties": {
           "parent_got_angle_revision": "fac9503c46405f77757b9a728eb85b8d7bc6080c",
           "parent_got_angle_revision_cp": "refs/heads/master@{#297276}",
           "parent_got_nacl_revision": "d998e125e8253980d76e269b7982aeeefc1b9b50",
           "parent_got_nacl_revision_cp": "refs/heads/master@{#274981}",
           "parent_got_revision": "f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9",
           "parent_got_revision_cp": "refs/heads/master@{#170242}",
           "parent_got_swarming_client_revision": "a0ee5d99f1d4b38ddaa4c759c837980b63b99566",
           "parent_got_swarming_client_revision_cp": "refs/heads/master@{#276089}",
           "parent_got_v8_revision": "801ada225ddc271c132c3a35f03975671d43e399",
           "parent_got_v8_revision_cp": "refs/heads/master@{#43426}",
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           "parent_got_webrtc_revision_cp": "refs/heads/master@{#120644}"
         }
       }
     ],
     "~followup_annotations": [
       "@@@STEP_TEXT@XP Tests (1)@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]