Add a snapshot of flutter/engine/src/build to our sdk

build/json_schema_compile.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': {
+    # When including this gypi, the following variables must be set:
+    #   schema_files:
+    #     An array of json or idl files that comprise the api model.
+    #   schema_include_rules (optional):
+    #     An array of paths to include when searching for referenced objects,
+    #     with the namespace separated by a :.
+    #     Example:
+    #       [ '/foo/bar:Foo::Bar::%(namespace)s' ]
+    #   cc_dir:
+    #     The directory to put the generated code in.
+    #   root_namespace:
+    #     A Python string substituion pattern used to generate the C++
+    #     namespace for each API. Use %(namespace)s to replace with the API
+    #     namespace, like "toplevel::%(namespace)s_api".
+    #
+    # Functions and namespaces can be excluded by setting "nocompile" to true.
+    'api_gen_dir': '<(DEPTH)/tools/json_schema_compiler',
+    'api_gen': '<(api_gen_dir)/compiler.py',
+    'schema_include_rules': [],
+  },
+  'rules': [
+    {
+      # GN version: json_schema_api.gni
+      'rule_name': 'genapi',
+      'msvs_external_rule': 1,
+      'extension': 'json',
+      'inputs': [
+        '<(api_gen_dir)/cc_generator.py',
+        '<(api_gen_dir)/code.py',
+        '<(api_gen_dir)/compiler.py',
+        '<(api_gen_dir)/cpp_generator.py',
+        '<(api_gen_dir)/cpp_type_generator.py',
+        '<(api_gen_dir)/cpp_util.py',
+        '<(api_gen_dir)/h_generator.py',
+        '<(api_gen_dir)/json_schema.py',
+        '<(api_gen_dir)/model.py',
+        '<(api_gen_dir)/util.cc',
+        '<(api_gen_dir)/util.h',
+        '<(api_gen_dir)/util_cc_helper.py',
+        # TODO(calamity): uncomment this when gyp on windows behaves like other
+        # platforms. List expansions of filepaths in inputs expand to different
+        # things.
+        # '<@(schema_files)',
+      ],
+      'outputs': [
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).cc',
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).h',
+      ],
+      'action': [
+        'python',
+        '<(api_gen)',
+        '<(RULE_INPUT_PATH)',
+        '--root=<(DEPTH)',
+        '--destdir=<(SHARED_INTERMEDIATE_DIR)',
+        '--namespace=<(root_namespace)',
+        '--generator=cpp',
+        '--include-rules=<(schema_include_rules)'
+      ],
+      'message': 'Generating C++ code from <(RULE_INPUT_PATH) json files',
+      'process_outputs_as_sources': 1,
+    },
+    {
+      'rule_name': 'genapi_idl',
+      'msvs_external_rule': 1,
+      'extension': 'idl',
+      'inputs': [
+        '<(api_gen_dir)/cc_generator.py',
+        '<(api_gen_dir)/code.py',
+        '<(api_gen_dir)/compiler.py',
+        '<(api_gen_dir)/cpp_generator.py',
+        '<(api_gen_dir)/cpp_type_generator.py',
+        '<(api_gen_dir)/cpp_util.py',
+        '<(api_gen_dir)/h_generator.py',
+        '<(api_gen_dir)/idl_schema.py',
+        '<(api_gen_dir)/model.py',
+        '<(api_gen_dir)/util.cc',
+        '<(api_gen_dir)/util.h',
+        '<(api_gen_dir)/util_cc_helper.py',
+        # TODO(calamity): uncomment this when gyp on windows behaves like other
+        # platforms. List expansions of filepaths in inputs expand to different
+        # things.
+        # '<@(schema_files)',
+      ],
+      'outputs': [
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).cc',
+        '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_DIRNAME)/<(RULE_INPUT_ROOT).h',
+      ],
+      'action': [
+        'python',
+        '<(api_gen)',
+        '<(RULE_INPUT_PATH)',
+        '--root=<(DEPTH)',
+        '--destdir=<(SHARED_INTERMEDIATE_DIR)',
+        '--namespace=<(root_namespace)',
+        '--generator=cpp',
+        '--include-rules=<(schema_include_rules)'
+      ],
+      'message': 'Generating C++ code from <(RULE_INPUT_PATH) IDL files',
+      'process_outputs_as_sources': 1,
+    },
+  ],
+  'include_dirs': [
+    '<(SHARED_INTERMEDIATE_DIR)',
+    '<(DEPTH)',
+  ],
+  'dependencies':[
+    '<(DEPTH)/tools/json_schema_compiler/api_gen_util.gyp:api_gen_util',
+  ],
+  'direct_dependent_settings': {
+    'include_dirs': [
+      '<(SHARED_INTERMEDIATE_DIR)',
+    ]
+  },
+  # This target exports a hard dependency because it generates header
+  # files.
+  'hard_dependency': 1,
+}