Extract functions from path recipe module so that step can depend on it

scripts/slave/recipe_modules/file/example.expected/file_io.json

Index: scripts/slave/recipe_modules/file/example.expected/file_io.json
diff --git a/scripts/slave/recipe_modules/file/example.expected/file_io.json b/scripts/slave/recipe_modules/file/example.expected/file_io.json
index fbc9fa691dae684b8ea6323bc4073884d5185a7d..10448e8336e42b531ce607d97324ca111019f23e 100644
--- a/scripts/slave/recipe_modules/file/example.expected/file_io.json
+++ b/scripts/slave/recipe_modules/file/example.expected/file_io.json
@@ -3,6 +3,75 @@
     "cmd": [
       "python",
       "-u",
+      "\nimport json, os, sys\nif os.path.exists(sys.argv[1]) and os.path.isdir(sys.argv[1]):\n  with open(sys.argv[2], 'w') as f:\n    json.dump(os.listdir(sys.argv[1]), f)\n",
+      "/fake/dir",
+      "/path/to/tmp/json"
+    ],
+    "name": "listdir fake dir",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@[@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"file 1\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"file 2\"@@@",
+      "@@@STEP_LOG_LINE@json.output@]@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import json, os, sys@@@",
+      "@@@STEP_LOG_LINE@python.inline@if os.path.exists(sys.argv[1]) and os.path.isdir(sys.argv[1]):@@@",
+      "@@@STEP_LOG_LINE@python.inline@  with open(sys.argv[2], 'w') as f:@@@",
+      "@@@STEP_LOG_LINE@python.inline@    json.dump(os.listdir(sys.argv[1]), f)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "some",
+      "command"
+    ],
+    "name": "manipulate file 1"
+  },
+  {
+    "cmd": [
+      "some",
+      "command"
+    ],
+    "name": "manipulate file 2"
+  },
+  {
+    "cmd": [
+      "echo",
+      "[TMP_BASE]/prefix_a_tmp_1"
+    ],
+    "name": "print prefix_a"
+  },
+  {
+    "cmd": [
+      "echo",
+      "[TMP_BASE]/prefix_b_tmp_2"
+    ],
+    "name": "print prefix_b"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport sys\nfrom common import chromium_utils\n\nchromium_utils.RemoveFilesWildcards(sys.argv[1], root=sys.argv[2])\n",
+      "*.o",
+      "[SLAVE_BUILD]"
+    ],
+    "name": "rmwildcard *.o in [SLAVE_BUILD]",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys@@@",
+      "@@@STEP_LOG_LINE@python.inline@from common import chromium_utils@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@chromium_utils.RemoveFilesWildcards(sys.argv[1], root=sys.argv[2])@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "abcde",
       "tmp_file.txt"