Move recipe engine to third_party/recipe_engine.

third_party/recipe_engine/recipe_util.py

Index: third_party/recipe_engine/recipe_util.py
diff --git a/scripts/slave/recipe_util.py b/third_party/recipe_engine/recipe_util.py
similarity index 88%
rename from scripts/slave/recipe_util.py
rename to third_party/recipe_engine/recipe_util.py
index e4095c27e47fc2b28e7715978020afb33ce0ef10..f3205d44206cf912d036988cec656a24badc9802 100644
--- a/scripts/slave/recipe_util.py
+++ b/third_party/recipe_engine/recipe_util.py
@@ -7,20 +7,6 @@ import os
 
 from cStringIO import StringIO
 
-
-SCRIPT_PATH = os.path.dirname(os.path.abspath(__file__))
-BUILD_ROOT = os.path.dirname(os.path.dirname(SCRIPT_PATH))
-ROOT_PATH = os.path.abspath(os.path.join(
-  SCRIPT_PATH, os.pardir, os.pardir, os.pardir))
-BASE_DIRS = [
-  SCRIPT_PATH,
-  os.path.join(ROOT_PATH, 'build_internal', 'scripts', 'slave'),
-  os.path.join(ROOT_PATH, 'build_internal', 'scripts', 'slave-internal')
-]
-MODULE_DIRS = lambda: [os.path.join(x, 'recipe_modules') for x in BASE_DIRS]
-RECIPE_DIRS = lambda: [os.path.join(x, 'recipes') for x in BASE_DIRS]
-
-
 class RecipeAbort(Exception):
   pass