Roll recipe dependencies (nontrivial).

scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json

Index: scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json
diff --git a/scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json b/scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json
index b4bfb7120400d11d943db113ac23e2345b7cdb5b..5bf798846d0a6173747df21f7b66ba916b7c106c 100644
--- a/scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json
+++ b/scripts/slave/recipes/flutter/flutter.expected/mac_cannot_find_xcode.json
@@ -6,7 +6,6 @@
       "\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]"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "rmcontents everything",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
@@ -33,7 +32,6 @@
       "--url",
       "https://chromium.googlesource.com/external/github.com/flutter/flutter"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "git setup"
   },
   {
@@ -107,7 +105,6 @@
     "cmd": [
       "[SLAVE_BUILD]/flutter/infra/download_android_tools.py"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "name": "download android tools"
   },
   {
@@ -118,7 +115,6 @@
       "--json-file",
       "/path/to/tmp/json"
     ],
-    "cwd": "[SLAVE_BUILD]",
     "env": {
       "ANDROID_HOME": "[SLAVE_BUILD]/flutter/infra/android_tools",
       "PATH": "[SLAVE_BUILD]/flutter/bin:[SLAVE_BUILD]/flutter/bin/cache/dart-sdk/bin:%(PATH)s",