V8: Switch on MB on older branches

scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json

Index: scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json
diff --git a/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json b/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json
index 92e836abe601f9288529955eacec65bd61d60eb4..c75b74972918c17d40ed2c53d85f62ce3ee7de94 100644
--- a/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json
+++ b/scripts/slave/recipes/v8.expected/full_client_dart_fyi_v8_win_release.json
@@ -133,6 +133,7 @@
     "cwd": "[SLAVE_BUILD]\\v8",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json",
+      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "fastbuild=1 gomadir='[CACHE]\\cipd\\goma' target_arch=ia32 use_goma=1 v8_enable_disassembler=1 v8_target_arch=ia32",
       "GYP_GENERATORS": "ninja",
       "GYP_MSVS_VERSION": "2013",
@@ -155,6 +156,37 @@
     "cmd": [
       "python",
       "-u",
+      "[SLAVE_BUILD]\\v8\\tools\\mb\\mb.py",
+      "gen",
+      "-m",
+      "client.dart.fyi",
+      "-b",
+      "v8-win-release",
+      "--config-file",
+      "[SLAVE_BUILD]\\v8\\infra\\mb\\mb_config.pyl",
+      "--goma-dir",
+      "[CACHE]\\cipd\\goma",
+      "--gyp-script=gypfiles\\gyp_v8",
+      "//out/Release"
+    ],
+    "cwd": "[SLAVE_BUILD]\\v8",
+    "env": {
+      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json",
+      "GYP_MSVS_VERSION": "2013"
+    },
+    "name": "generate_build_files",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@stdout@some line@@@",
+      "@@@STEP_LOG_LINE@stdout@GYP_DEFINES='target_arch=x64 cool_flag=a=1'@@@",
+      "@@@STEP_LOG_LINE@stdout@moar@@@",
+      "@@@STEP_LOG_END@stdout@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[SLAVE_BUILD]\\v8\\out\\gn",
       "511"