Reland 596ff54335b2a1b393af10657bc4945114f3beed - Split API bundle generation steps

extensions/common/api/api.gyp

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       # GN version: //extensions/common/api
       'target_name': 'extensions_api',
       'type': 'static_library',
-      'sources': [
-        '<@(schema_files)',
-      ],
       # TODO(jschuh): http://crbug.com/167187 size_t -> int
       'msvs_disabled_warnings': [ 4267 ],
       'includes': [
         '../../../build/json_schema_bundle_compile.gypi',
         '../../../build/json_schema_compile.gypi',
-      ],
-      'variables': {
-        'chromium_code': 1,
-        'non_compiled_schema_files': [
-        ],
-        'conditions': [
-          ['enable_extensions==1', {
-            # Note: file list duplicated in GN build.
-            'schema_files': [
-              'app_runtime.idl',
-              'app_view_internal.json',
-              'cast_channel.idl',
-              'dns.idl',
-              'extensions_manifest_types.json',
-              'hid.idl',
-              'power.idl',
-              'runtime.json',
-              'serial.idl',
-              'socket.idl',
-              'sockets_tcp.idl',
-              'sockets_tcp_server.idl',
-              'sockets_udp.idl',
-              'storage.json',
-              'test.json',
-              'usb.idl',
-              'usb_private.idl',
-            ],
-          }, {
-            # TODO: Eliminate these on Android. See crbug.com/305852.
-            'schema_files': [
-              'runtime.json',
-            ],
-          }],
-        ],
-        'cc_dir': 'extensions/common/api',
-        'root_namespace': 'extensions::core_api::%(namespace)s',
-        'impl_dir': 'extensions/browser/api',
-      },
-      'conditions': [
-        ['enable_extensions==1', {
-          'dependencies': [
-            '<(DEPTH)/device/serial/serial.gyp:device_serial',
-            '<(DEPTH)/skia/skia.gyp:skia',
-          ],
-        }],
+        'schemas.gypi',
       ],
     },
   ],
 }