Make the config -> pythonish conversion a gclient module function.

recipe_modules/gclient/api.py

Index: recipe_modules/gclient/api.py
diff --git a/recipe_modules/gclient/api.py b/recipe_modules/gclient/api.py
index 558e9d9c5e68ca10e91ff643162da8dcdb6b2bb2..2d9ed949f5f72d6c78cd16552648245fc63fce81 100644
--- a/recipe_modules/gclient/api.py
+++ b/recipe_modules/gclient/api.py
@@ -50,6 +50,12 @@ class ProjectRevisionResolver(RevisionResolver):
 
 
 def jsonish_to_python(spec, is_top=False):
+  """Turn a json spec into a python parsable object.
+
+  This exists because Gclient specs, while resembling json, is actually
+  ingested using a python "eval()".  Therefore a bit of plumming is required
+  to turn our newly constructed Gclient spec into a gclient-readable spec.
+  """
   ret = ''
   if is_top:  # We're the 'top' level, so treat this dict as a suite.
     ret = '\n'.join(
@@ -131,6 +137,10 @@ class GclientApi(recipe_api.RecipeApi):
       'CACHE_DIR': self.m.path['git_cache'],
     }
 
+  @staticmethod
+  def config_to_pythonish(cfg):
+    return jsonish_to_python(cfg.as_jsonish(), True)
+
   def resolve_revision(self, revision):
     if hasattr(revision, 'resolve'):
       return revision.resolve(self.m.properties)
@@ -241,9 +251,7 @@ class GclientApi(recipe_api.RecipeApi):
     if inject_parent_got_revision:
       self.inject_parent_got_revision(cfg, override=True)
 
-    spec_string = jsonish_to_python(cfg.as_jsonish(), True)
-
-    self('setup', ['config', '--spec', spec_string], **kwargs)
+    self('setup', ['config', '--spec', self.config_to_pythonish(cfg)], **kwargs)
 
     sync_step = None
     try: