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

scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Android__Nexus4_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.webkit",
       "--builder",
       "WebKit Android (Nexus4)",
@@ skipping 102 matching lines @@
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/cleanup_temp.py"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "cleanup_temp"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
-      "\nimport shutil, sys, os\nshutil.rmtree(sys.argv[1], True)\nshutil.rmtree(sys.argv[2], True)\ntry:\n  os.remove(sys.argv[3])\nexcept OSError:\n  pass\nfor base, _dirs, files in os.walk(sys.argv[4]):\n  for f in files:\n    if f.endswith('.pyc'):\n      os.remove(os.path.join(base, f))\n",
-      "[SLAVE_BUILD]/src/out/Release/debug_info_dumps",
-      "[SLAVE_BUILD]/src/out/Release/test_logs",
-      "[SLAVE_BUILD]/src/out/build_product.zip",
-      "[SLAVE_BUILD]/src"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "clean local files",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@python.inline@@@@",
-      "@@@STEP_LOG_LINE@python.inline@import shutil, sys, os@@@",
-      "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[1], True)@@@",
-      "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[2], True)@@@",
-      "@@@STEP_LOG_LINE@python.inline@try:@@@",
-      "@@@STEP_LOG_LINE@python.inline@  os.remove(sys.argv[3])@@@",
-      "@@@STEP_LOG_LINE@python.inline@except OSError:@@@",
-      "@@@STEP_LOG_LINE@python.inline@  pass@@@",
-      "@@@STEP_LOG_LINE@python.inline@for base, _dirs, files in os.walk(sys.argv[4]):@@@",
-      "@@@STEP_LOG_LINE@python.inline@  for f in files:@@@",
-      "@@@STEP_LOG_LINE@python.inline@    if f.endswith('.pyc'):@@@",
-      "@@@STEP_LOG_LINE@python.inline@      os.remove(os.path.join(base, f))@@@",
-      "@@@STEP_LOG_END@python.inline@@@"
-    ]
-  },
-  {
-    "allow_subannotations": false,
-    "cmd": [
-      "[SLAVE_BUILD]/src/build/tree_truth.sh",
-      "[SLAVE_BUILD]/src",
-      "src"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "tree truth steps"
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
       "\nimport os, sys\nfrom common import chromium_utils\n\nif os.path.exists(sys.argv[1]):\n  chromium_utils.RemoveDirectory(sys.argv[1])\n",
       "[SLAVE_BUILD]/src/out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "rmtree build directory",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import os, sys@@@",
       "@@@STEP_LOG_LINE@python.inline@from common import chromium_utils@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ skipping 52 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@import sys@@@",
       "@@@STEP_LOG_LINE@python.inline@adb_path = sys.argv[1]@@@",
       "@@@STEP_LOG_LINE@python.inline@for device in sys.argv[2:]:@@@",
       "@@@STEP_LOG_LINE@python.inline@  subprocess.check_call([adb_path, '-s', device, 'root'])@@@",
       "@@@STEP_LOG_LINE@python.inline@  subprocess.check_call([adb_path, '-s', device, 'wait-for-device'])@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
+      "python",
+      "-u",
+      "[BUILD]/scripts/slave/cleanup_temp.py"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "cleanup_temp"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport shutil, sys, os\nshutil.rmtree(sys.argv[1], True)\nshutil.rmtree(sys.argv[2], True)\ntry:\n  os.remove(sys.argv[3])\nexcept OSError:\n  pass\nfor base, _dirs, files in os.walk(sys.argv[4]):\n  for f in files:\n    if f.endswith('.pyc'):\n      os.remove(os.path.join(base, f))\n",
+      "[SLAVE_BUILD]/src/out/Release/debug_info_dumps",
+      "[SLAVE_BUILD]/src/out/Release/test_logs",
+      "[SLAVE_BUILD]/src/out/build_product.zip",
+      "[SLAVE_BUILD]/src"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "clean local files",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import shutil, sys, os@@@",
+      "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[1], True)@@@",
+      "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[2], True)@@@",
+      "@@@STEP_LOG_LINE@python.inline@try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  os.remove(sys.argv[3])@@@",
+      "@@@STEP_LOG_LINE@python.inline@except OSError:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  pass@@@",
+      "@@@STEP_LOG_LINE@python.inline@for base, _dirs, files in os.walk(sys.argv[4]):@@@",
+      "@@@STEP_LOG_LINE@python.inline@  for f in files:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    if f.endswith('.pyc'):@@@",
+      "@@@STEP_LOG_LINE@python.inline@      os.remove(os.path.join(base, f))@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "allow_subannotations": false,
+    "cmd": [
+      "[SLAVE_BUILD]/src/build/tree_truth.sh",
+      "[SLAVE_BUILD]/src",
+      "src"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "tree truth steps"
+  },
+  {
+    "cmd": [
       "[BUILD]/scripts/slave/daemonizer.py",
       "--",
       "[SLAVE_BUILD]/src/build/android/adb_logcat_monitor.py",
       "[SLAVE_BUILD]/src/out/logcat"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "spawn_logcat_monitor"
@@ skipping 251 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@import glob, os, sys@@@",
       "@@@STEP_LOG_LINE@python.inline@for report in glob.glob(sys.argv[1]):@@@",
       "@@@STEP_LOG_LINE@python.inline@  with open(report, 'r') as f:@@@",
       "@@@STEP_LOG_LINE@python.inline@    for l in f.readlines():@@@",
       "@@@STEP_LOG_LINE@python.inline@      print l@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   }
 ]