Roll recipe dependencies (nontrivial).

scripts/slave/recipes/flutter/engine.expected/linux.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\nfrom common import chromium_utils # Error? See https://crbug.com/584783.\n\npath = sys.argv[1]\nif os.path.exists(path):\n  for p in (os.path.join(path, x) for x in os.listdir(path)):\n    if os.path.isdir(p):\n      chromium_utils.RemoveDirectory(p)\n    else:\n      os.unlink(p)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "rmcontents everything",
     "~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 # Error? See https://crbug.com/584783.@@@",
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@path = sys.argv[1]@@@",
       "@@@STEP_LOG_LINE@python.inline@if os.path.exists(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@  for p in (os.path.join(path, x) for x in os.listdir(path)):@@@",
       "@@@STEP_LOG_LINE@python.inline@    if os.path.isdir(p):@@@",
       "@@@STEP_LOG_LINE@python.inline@      chromium_utils.RemoveDirectory(p)@@@",
       "@@@STEP_LOG_LINE@python.inline@    else:@@@",
       "@@@STEP_LOG_LINE@python.inline@      os.unlink(p)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
-      "--master",
-      "client.flutter",
-      "--builder",
-      "Linux Engine",
-      "--slave",
-      "fake-m1",
       "--spec",
       "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'src/flutter', 'url': 'https://chromium.googlesource.com/external/github.com/flutter/engine'}]\ntarget_os = ['android']",
       "--root",
       "src/flutter",
       "--revision_mapping_file",
       "{\"src/flutter\": \"got_engine_revision\"}",
       "--git-cache-dir",
       "[GIT_CACHE]",
       "--output_json",
       "/path/to/tmp/json",
@@ skipping 1051 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  chromium_utils.RemoveDirectory(sys.argv[1])@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]