Use MB on all of the blink bots.

scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json

Index: scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json
diff --git a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json
index e6e37352f85a1206d630a32f699f76500540ee1b..f72cf8138a38fb0707ef5db2e815249e76fb3aef 100644
--- a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json
+++ b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_blink_mac_blink_compile_dbg.json
@@ -119,6 +119,7 @@
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
+      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "clang=1 component=shared_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' target_arch=x64 test_isolation_mode=prepare use_goma=1"
     },
     "name": "gclient runhooks (with patch)"
@@ -241,6 +242,25 @@
     "name": "cleanup_temp"
   },
   {
+    "cmd": [
+      "python",
+      "-u",
+      "[SLAVE_BUILD]/src/tools/mb/mb.py",
+      "gen",
+      "-m",
+      "tryserver.blink",
+      "-b",
+      "mac_blink_compile_dbg",
+      "--config-file",
+      "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
+      "--goma-dir",
+      "[BUILD]/goma",
+      "//out/Debug"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "generate_build_files (with patch)"
+  },
+  {
     "allow_subannotations": true,
     "cmd": [
       "python",