Revert of Cross-repo recipe package system.

scripts/slave/recipe_modules/json/test_api.py

Index: scripts/slave/recipe_modules/json/test_api.py
diff --git a/scripts/slave/recipe_modules/json/test_api.py b/scripts/slave/recipe_modules/json/test_api.py
new file mode 100644
index 0000000000000000000000000000000000000000..3e544ea8f000f286dbe84fd9e9dc990688320b22
--- /dev/null
+++ b/scripts/slave/recipe_modules/json/test_api.py
@@ -0,0 +1,15 @@
+import json
+
+from recipe_engine import recipe_test_api
+
+class JsonTestApi(recipe_test_api.RecipeTestApi):
+  @recipe_test_api.placeholder_step_data
+  @staticmethod
+  def output(data, retcode=None):
+    return json.dumps(data), retcode
+
+  def output_stream(self, data, stream='stdout', retcode=None):
+    assert stream in ('stdout', 'stderr')
+    ret = recipe_test_api.StepTestData()
+    setattr(ret, stream, self.output(data, retcode).unwrap_placeholder())
+    return ret