mozillaGH-36 Update csp_replace to use new settings style

csp/decorators.py

@@ -31,8 +31,8 @@ def _wrapped(*a, **kw):
     return decorator
 
 
-def csp_replace(**kwargs):
-    replace = dict((k.lower().replace('_', '-'), v) for k, v in kwargs.items())
+def csp_replace(csp_names=default, **kwargs):
+    replace = _policies_from_names_and_kwargs(csp_names, **kwargs)
 
     def decorator(f):
         @wraps(f)