Add swarming support for MB (and the GN bots) in the chromium recipes.

scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json

Index: scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json
diff --git a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json
index 635dd7db7be972ff824b540306d392a6a4fa30d0..a41ce9a8b3b8f272151af736d277c5e8ff6a0d27 100644
--- a/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json
+++ b/scripts/slave/recipes/chromium_trybot.expected/full_tryserver_chromium_win_win8_chromium_ng_analyze.json
@@ -80,34 +80,28 @@
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS]\\gclient.py",
-      "runhooks"
+      "[SLAVE_BUILD]\\src\\tools\\swarming_client\\swarming.py",
+      "--version"
     ],
     "cwd": "[SLAVE_BUILD]",
-    "env": {
-      "GYP_CHROMIUM_NO_ACTION": "1"
-    },
-    "name": "gclient runhooks (with patch)"
+    "name": "swarming.py --version",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_TEXT@0.4.10@@@"
+    ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\src\\tools\\mb\\mb.py",
-      "gen",
-      "-v",
-      "-m",
-      "chromium.win",
-      "-b",
-      "Win8 Aura",
-      "--config-file",
-      "[SLAVE_BUILD]\\src\\tools\\mb\\mb_config.pyl",
-      "--goma-dir",
-      "[BUILD]\\goma",
-      "//out/Debug"
+      "[DEPOT_TOOLS]\\gclient.py",
+      "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
-    "name": "generate_build_files"
+    "env": {
+      "GYP_CHROMIUM_NO_ACTION": "1"
+    },
+    "name": "gclient runhooks (with patch)"
   },
   {
     "cmd": [