Generate ax enums from idl.

tools/json_schema_compiler/cpp_util.py

Index: tools/json_schema_compiler/cpp_util.py
diff --git a/tools/json_schema_compiler/cpp_util.py b/tools/json_schema_compiler/cpp_util.py
index 1e7c3707883bccdce8fd80279e210ad0620bee36..e7c29ac0777de2efdc31ec7bc5a77e2e67d95b69 100644
--- a/tools/json_schema_compiler/cpp_util.py
+++ b/tools/json_schema_compiler/cpp_util.py
@@ -110,6 +110,10 @@ def OpenNamespace(namespace):
   """Get opening root namespace declarations.
   """
   c = Code()
+  # In lieu of GYP supporting None for the namespace variable the '' namespace
+  # implies there is no root namespace.
+  if namespace == '':
+    return c
   for component in namespace.split('::'):
     c.Append('namespace %s {' % component)
   return c
@@ -119,6 +123,10 @@ def CloseNamespace(namespace):
   """Get closing root namespace declarations.
   """
   c = Code()
+  # In lieu of GYP supporting None for the namespace variable the '' namespace
+  # implies there is no root namespace.
+  if namespace == '':
+    return c
   for component in reversed(namespace.split('::')):
     c.Append('}  // namespace %s' % component)
   return c