Add field-initializing constructors to generated mojo structs.

mojo/public/tools/bindings/generate_type_mappings.py

 #!/usr/bin/env python
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """Generates a JSON typemap from its command-line arguments and dependencies.
 
 Each typemap should be specified in an command-line argument of the form
 key=value, with an argument of "--start-typemap" preceding each typemap.
 
 For example,
@@ skipping 89 matching lines @@
     attributes = []
     if match_result.group(3):
       attributes = match_result.group(3).split(',')
 
     assert mojom_type not in result, (
         "Cannot map multiple native types (%s, %s) to the same mojom type: %s" %
         (result[mojom_type]['typename'], native_type, mojom_type))
 
     result[mojom_type] = {
         'typename': native_type,
+        'non_copyable_non_movable': 'non_copyable_non_movable' in attributes,
         'move_only': 'move_only' in attributes,
         'copyable_pass_by_value': 'copyable_pass_by_value' in attributes,
         'nullable_is_same_type': 'nullable_is_same_type' in attributes,
         'hashable': 'hashable' in attributes,
         'public_headers': values['public_headers'],
         'traits_headers': values['traits_headers'],
     }
   return result
 
 
@@ skipping 18 matching lines @@
   if missing:
     raise IOError('Missing dependencies: %s' % ', '.join(missing))
   for path in params.dependency:
     typemaps.update(ReadTypemap(path))
   with open(params.output, 'w') as f:
     json.dump({'c++': typemaps}, f, indent=2)
 
 
 if __name__ == '__main__':
   main()