[mojo] Add mojom parser support for native-only structs

mojo/public/tools/bindings/pylib/mojom/parse/parser.py

Index: mojo/public/tools/bindings/pylib/mojom/parse/parser.py
diff --git a/mojo/public/tools/bindings/pylib/mojom/parse/parser.py b/mojo/public/tools/bindings/pylib/mojom/parse/parser.py
index bdc13cfe26afa232eace699938a1303d570e6c48..74f8d436450917c9b1302bfe753cf6149168b0c4 100644
--- a/mojo/public/tools/bindings/pylib/mojom/parse/parser.py
+++ b/mojo/public/tools/bindings/pylib/mojom/parse/parser.py
@@ -155,10 +155,14 @@ class Parser(object):
     # 'eval' the literal to strip the quotes.
     p[0] = eval(p[1])
 
-  def p_struct(self, p):
+  def p_struct_1(self, p):
     """struct : attribute_section STRUCT NAME LBRACE struct_body RBRACE SEMI"""
     p[0] = ast.Struct(p[3], p[1], p[5])
 
+  def p_struct_2(self, p):
+    """struct : attribute_section STRUCT NAME SEMI"""
+    p[0] = ast.Struct(p[3], p[1], None)
+
   def p_struct_body_1(self, p):
     """struct_body : """
     p[0] = ast.StructBody()