Set up depot_tools as a recipe package, and add depot_tools recipe module.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 2877144f351bded08cd6791984c52aa6e2d6ebcd..8c11447af728ca7a1f179b40cddec6e444b71216 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -16,6 +16,7 @@ def CommonChecks(input_api, output_api, tests_to_black_list):
   results = []
   results.extend(input_api.canned_checks.CheckOwners(input_api, output_api))
   black_list = list(input_api.DEFAULT_BLACK_LIST) + [
+      r'^\.recipe_deps[\/\\].*',
       r'^cpplint\.py$',
       r'^cpplint_chromium\.py$',
       r'^external_bin[\/\\].+',