gsutil: use depot_tools.gsutil_py_path instead of path['depot_tools']

scripts/slave/recipes/infra/publish_tarball.expected/basic.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "ls",
       "gs://chromium-browser-official/"
     ],
     "name": "gsutil ls",
     "stdout": "/path/to/tmp/"
   },
   {
     "cmd": [
       "python",
@@ skipping 145 matching lines @@
     ],
     "cwd": "[TMP_BASE]/export_tarball_tmp_1",
     "name": "export_tarball"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "[TMP_BASE]/export_tarball_tmp_1/chromium-38.0.2125.122.tar.xz",
       "gs://chromium-browser-official/chromium-38.0.2125.122.tar.xz"
     ],
     "name": "gsutil upload chromium-38.0.2125.122.tar.xz",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122.tar.xz@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::chromium]/resources/generate_hashes.py",
       "[TMP_BASE]/export_tarball_tmp_1/chromium-38.0.2125.122.tar.xz",
       "/path/to/tmp/"
     ],
     "name": "generate_hashes"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "md5  164ebd6889588da166a52ca0d57b9004  bash",
       "gs://chromium-browser-official/chromium-38.0.2125.122.tar.xz.hashes"
     ],
     "name": "gsutil upload chromium-38.0.2125.122.tar.xz.hashes",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122.tar.xz.hashes@@@"
@@ skipping 32 matching lines @@
     ],
     "cwd": "[TMP_BASE]/export_tarball_tmp_2",
     "name": "export_tarball (2)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "[TMP_BASE]/export_tarball_tmp_2/chromium-38.0.2125.122.tar.xz",
       "gs://chromium-browser-official/chromium-38.0.2125.122-testdata.tar.xz"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-testdata.tar.xz",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-testdata.tar.xz@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::chromium]/resources/generate_hashes.py",
       "[TMP_BASE]/export_tarball_tmp_2/chromium-38.0.2125.122.tar.xz",
       "/path/to/tmp/"
     ],
     "name": "generate_hashes (2)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "md5  164ebd6889588da166a52ca0d57b9004  bash",
       "gs://chromium-browser-official/chromium-38.0.2125.122-testdata.tar.xz.hashes"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-testdata.tar.xz.hashes",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-testdata.tar.xz.hashes@@@"
@@ skipping 495 matching lines @@
     ],
     "cwd": "[TMP_BASE]/export_tarball_tmp_4",
     "name": "export_tarball (3)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "[TMP_BASE]/export_tarball_tmp_4/chromium-38.0.2125.122.tar.xz",
       "gs://chromium-browser-official/chromium-38.0.2125.122-lite.tar.xz"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-lite.tar.xz",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-lite.tar.xz@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::chromium]/resources/generate_hashes.py",
       "[TMP_BASE]/export_tarball_tmp_4/chromium-38.0.2125.122.tar.xz",
       "/path/to/tmp/"
     ],
     "name": "generate_hashes (3)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "md5  164ebd6889588da166a52ca0d57b9004  bash",
       "gs://chromium-browser-official/chromium-38.0.2125.122-lite.tar.xz.hashes"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-lite.tar.xz.hashes",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-lite.tar.xz.hashes@@@"
@@ skipping 74 matching lines @@
     ],
     "cwd": "[TMP_BASE]/export_tarball_tmp_6",
     "name": "export_tarball (4)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "[TMP_BASE]/export_tarball_tmp_6/chromium-38.0.2125.122.tar.xz",
       "gs://chromium-browser-official/chromium-38.0.2125.122-nacl.tar.xz"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-nacl.tar.xz",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-nacl.tar.xz@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::chromium]/resources/generate_hashes.py",
       "[TMP_BASE]/export_tarball_tmp_6/chromium-38.0.2125.122.tar.xz",
       "/path/to/tmp/"
     ],
     "name": "generate_hashes (4)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::gsutil]/resources/gsutil_wrapper.py",
       "--",
-      "[DEPOT_TOOLS]/gsutil.py",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "----",
       "cp",
       "-a",
       "public-read",
       "md5  164ebd6889588da166a52ca0d57b9004  bash",
       "gs://chromium-browser-official/chromium-38.0.2125.122-nacl.tar.xz.hashes"
     ],
     "name": "gsutil upload chromium-38.0.2125.122-nacl.tar.xz.hashes",
     "~followup_annotations": [
       "@@@STEP_LINK@gsutil.upload@https://storage.cloud.google.com/chromium-browser-official/chromium-38.0.2125.122-nacl.tar.xz.hashes@@@"
@@ skipping 36 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
   }
 ]