Run the JSON Schema Compiler's bundle compilation on JSON files. Previously it

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:
-    #   json_schema_files: a list of json files that comprise the api model.
-    #   idl_schema_files: a list of IDL files that comprise the api model.
+    #   schema_files: a list of json or IDL files that comprise the api model.
     #   cc_dir: path to generated files
     #   root_namespace: the C++ namespace that all generated files go under
     # 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',
   },
   'rules': [
     {
       'rule_name': 'genapi',
+      'msvs_external_rule': 1,
       'extension': 'json',
       'inputs': [
         '<(api_gen_dir)/any.cc',
         '<(api_gen_dir)/any.h',
         '<(api_gen_dir)/any_helper.py',
         '<(api_gen_dir)/cc_generator.py',
         '<(api_gen_dir)/code.py',
         '<(api_gen_dir)/compiler.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.
-        # '<@(json_schema_files)',
+        # '<@(schema_files)',
       ],
       'outputs': [
         '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).cc',
         '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).h',
       ],
       'action': [
         'python',
         '<(api_gen)',
         '<(RULE_INPUT_PATH)',
         '--root=<(DEPTH)',
@@ skipping 18 matching lines @@
         '<(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.
-        # '<@(idl_schema_files)',
+        # '<@(schema_files)',
       ],
       'outputs': [
         '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).cc',
         '<(SHARED_INTERMEDIATE_DIR)/<(cc_dir)/<(RULE_INPUT_ROOT).h',
       ],
       'action': [
         'python',
         '<(api_gen)',
         '<(RULE_INPUT_PATH)',
         '--root=<(DEPTH)',
@@ skipping 13 matching lines @@
   ],
   'direct_dependent_settings': {
     'include_dirs': [
       '<(SHARED_INTERMEDIATE_DIR)',
     ]
   },
   # This target exports a hard dependency because it generates header
   # files.
   'hard_dependency': 1,
 }