JSON Schema Compiler supports functions as PropertyTypes.

chrome/chrome_tests.gypi

 # Copyright (c) 2012 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 2025 matching lines @@
         '../skia/ext/vector_canvas_unittest.cc',
         '../testing/gtest_mac_unittest.mm',
         '../third_party/cld/encodings/compact_lang_det/compact_lang_det_unittest_small.cc',
         '../tools/json_schema_compiler/test/additional_properties_unittest.cc',
         '../tools/json_schema_compiler/test/any_unittest.cc',
         '../tools/json_schema_compiler/test/arrays_unittest.cc',
         '../tools/json_schema_compiler/test/callbacks_unittest.cc',
         '../tools/json_schema_compiler/test/choices_unittest.cc',
         '../tools/json_schema_compiler/test/crossref_unittest.cc',
         '../tools/json_schema_compiler/test/enums_unittest.cc',
+        '../tools/json_schema_compiler/test/functions_as_parameters_unittest.cc',
         '../tools/json_schema_compiler/test/functions_on_types_unittest.cc',
         '../tools/json_schema_compiler/test/idl_schemas_unittest.cc',
         '../tools/json_schema_compiler/test/objects_unittest.cc',
         '../tools/json_schema_compiler/test/simple_api_unittest.cc',
         '../ui/views/test/test_views_delegate.cc',
         '../ui/views/test/test_views_delegate.h',
         '../ui/views/test/views_test_base.cc',
         '../ui/views/test/views_test_base.h',
         '../webkit/glue/web_intent_service_data_unittest.cc',
         '../webkit/quota/mock_storage_client.cc',
@@ skipping 2631 matching lines @@
             'input_jars_paths': [
               '<(PRODUCT_DIR)/lib.java/chromium_base.jar',
              ],
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],  # 'conditions'
 }