Cross-repo recipe package system.

scripts/slave/recipes/chromium_trybot.py

Index: scripts/slave/recipes/chromium_trybot.py
diff --git a/scripts/slave/recipes/chromium_trybot.py b/scripts/slave/recipes/chromium_trybot.py
index 43b2311285ebf5abaeffec82b15867818e56eda2..d11c8ecd2c5f73885864a31ac4e8c163c0c76352 100644
--- a/scripts/slave/recipes/chromium_trybot.py
+++ b/scripts/slave/recipes/chromium_trybot.py
@@ -4,7 +4,7 @@
 
 import collections
 
-from infra.libs.infra_types import freeze
+from recipe_engine.types import freeze
 
 DEPS = [
   'amp',
@@ -12,10 +12,10 @@ DEPS = [
   'chromium',
   'chromium_android',
   'chromium_tests',
+  'file',
   'gclient',
   'gpu',
   'isolate',
-  'itertools',
   'json',
   'path',
   'platform',
@@ -808,6 +808,13 @@ def _RunStepsInternal(api):
 
 
 def RunSteps(api):
+  # build/tests/masters_recipes_tests.py needs to manipulate the BUILDERS
+  # dict, so we provide an API to dump it here.
+  if api.properties.get('dump_builders'):  # pragma: no cover
+    api.file.copy('Dump BUILDERS dict',
+        api.json.input(BUILDERS), api.properties['dump_builders'])
+    return
+
   with api.tryserver.set_failure_hash():
     return _RunStepsInternal(api)