Fix depot_tools presubmit's local_rietveld script.

fetch_configs/infra.py

Index: fetch_configs/infra.py
diff --git a/fetch_configs/infra.py b/fetch_configs/infra.py
index 12e5c9646a766632dffe6dc2fd4378a2bba9366c..29681b21b9c07dffeed2e3f879546ff9b541cacc 100644
--- a/fetch_configs/infra.py
+++ b/fetch_configs/infra.py
@@ -13,7 +13,9 @@ class Infra(config_util.Config):
   """Basic Config class for the Infrastructure repositories."""
 
   @staticmethod
-  def fetch_spec(_props):
+  def fetch_spec(props):
+    # This is used by [depot_tools]/testing_support/local_rietveld.py
+    managed = props.get('managed', 'false').lower() == 'true'
     return {
       'type': 'gclient_git',
       'gclient_git_spec': {
@@ -22,7 +24,7 @@ class Infra(config_util.Config):
             'name'     : 'infra',
             'url'      : 'https://chromium.googlesource.com/infra/infra.git',
             'deps_file': '.DEPS.git',
-            'managed'  : False,
+            'managed'  : managed,
           }
         ],
       },