Cross-repo recipe package system.

scripts/slave/recipes/chromium.py

Index: scripts/slave/recipes/chromium.py
diff --git a/scripts/slave/recipes/chromium.py b/scripts/slave/recipes/chromium.py
index 093a74c65735937ea1439158c2bf4b43076e337b..0c0b0cceb2b606023cffd3be75b2dd50addd6820 100644
--- a/scripts/slave/recipes/chromium.py
+++ b/scripts/slave/recipes/chromium.py
@@ -9,6 +9,7 @@ DEPS = [
   'chromium',
   'chromium_android',
   'chromium_tests',
+  'file',
   'isolate',
   'json',
   'path',
@@ -21,8 +22,24 @@ DEPS = [
   'test_utils',
 ]
 
+from recipe_engine import config_types
+
+def ignore_undumpable(obj):  # pragma: no cover
+  try:
+    return config_types.json_fixup(obj)
+  except TypeError:
+    return None
+
 
 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.write(
+        'Dump BUILDERS dict', api.properties['dump_builders'],
+        api.json.dumps(api.chromium_tests.builders, default=ignore_undumpable))
+    return
+
   mastername = api.properties.get('mastername')
   buildername = api.properties.get('buildername')
 
@@ -532,4 +549,4 @@ def GenTests(api):
         parent_build_archive_url='gs://test-domain/test-archive.zip'
     ) +
     api.override_step_data('[collect] base_unittests', retcode=1)
-  )
+  )