Add key params for buildbotless bots in DM/nanobench

infra/bots/recipes/swarm_test.expected/nobuildbot.json

 [
   {
     "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]/tmp",
       "511"
     ],
     "name": "makedirs tmp_dir",
@@ skipping 157 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@    if retry == RETRIES:@@@",
       "@@@STEP_LOG_LINE@python.inline@      raise@@@",
       "@@@STEP_LOG_LINE@python.inline@    waittime = WAIT_BASE * math.pow(2, retry)@@@",
       "@@@STEP_LOG_LINE@python.inline@    print 'Retry in %d seconds.' % waittime@@@",
       "@@@STEP_LOG_LINE@python.inline@    time.sleep(waittime)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
-      "catchsegv",
+      "python",
+      "-u",
+      "import os\nprint os.environ.get('SWARMING_BOT_ID', '')\n"
+    ],
+    "name": "get swarming bot id",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@import os@@@",
+      "@@@STEP_LOG_LINE@python.inline@print os.environ.get('SWARMING_BOT_ID', '')@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "import os\nprint os.environ.get('SWARMING_TASK_ID', '')\n"
+    ],
+    "name": "get swarming task id",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@import os@@@",
+      "@@@STEP_LOG_LINE@python.inline@print os.environ.get('SWARMING_TASK_ID', '')@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
       "[SLAVE_BUILD]/out/Debug/dm",
       "--undefok",
       "--resourcePath",
       "[SLAVE_BUILD]/skia/resources",
       "--skps",
       "[SLAVE_BUILD]/skp",
       "--images",
       "[SLAVE_BUILD]/skimage/dm",
       "--colorImages",
       "[SLAVE_BUILD]/skimage/colorspace",
       "--nameByHash",
       "--properties",
       "gitHash",
       "abc123",
       "master",
       "client.skia",
       "builder",
       "Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Debug-Trybot",
       "build_number",
       "5",
       "issue",
       "2100",
       "patchset",
       "2",
       "patch_storage",
       "gerrit",
+      "no_buildbot",
+      "True",
+      "swarming_bot_id",
+      "skia-bot-123",
+      "swarming_task_id",
+      "123456",
       "--svgs",
       "[SLAVE_BUILD]/svg",
       "--key",
       "arch",
       "x86",
       "compiler",
       "GCC",
       "configuration",
       "Debug",
       "cpu_or_gpu",
@@ skipping 237 matching lines @@
       "gamut",
       "2ndpic-8888",
       "gm",
       "_",
       "gamut",
       "serialize-8888",
       "gm",
       "_",
       "gamut"
     ],
-    "cwd": "[SLAVE_BUILD]/skia",
+    "env": {
+      "BUILDTYPE": "Debug",
+      "CHROME_HEADLESS": "1",
+      "SKIA_OUT": "[SLAVE_BUILD]/out"
+    },
     "name": "dm"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]