Revert of Cross-repo recipe package system.

scripts/slave/recipe_universe.py

+# Copyright (c) 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+
+BUILD_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(
+    os.path.abspath(__file__))))
+BUILD_INTERNAL_ROOT = os.path.join(
+    os.path.dirname(BUILD_ROOT), 'build_internal')
+
+sys.path.append(os.path.join(BUILD_ROOT, 'third_party'))
+
+_UNIVERSE = None
+def get_universe():
+  from recipe_engine import loader
+  global _UNIVERSE
+  if _UNIVERSE is None:
+    roots = [BUILD_ROOT, BUILD_INTERNAL_ROOT]
+    _UNIVERSE = loader.RecipeUniverse(
+        module_dirs=[ os.path.join(root, 'scripts', 'slave', 'recipe_modules')
+                      for root in roots ],
+        recipe_dirs=[ os.path.join(root, 'scripts', 'slave', 'recipes')
+                      for root in roots ])
+  return _UNIVERSE
+