Migrate dart2js stubs for dart:io

tool/input_sdk/lib/io/io_sources.gypi

Index: tool/input_sdk/lib/io/io_sources.gypi
diff --git a/tool/input_sdk/lib/io/io_sources.gypi b/tool/input_sdk/lib/io/io_sources.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..10a6bf480244688be97dc891b9f0f6f95dc00b90
--- /dev/null
+++ b/tool/input_sdk/lib/io/io_sources.gypi
@@ -0,0 +1,42 @@
+# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+{
+  'sources': [
+    'io.dart',
+    # The above file needs to be first if additional parts are added to the lib.
+    'bytes_builder.dart',
+    'common.dart',
+    'crypto.dart',
+    'data_transformer.dart',
+    'directory.dart',
+    'directory_impl.dart',
+    'eventhandler.dart',
+    'file.dart',
+    'file_impl.dart',
+    'file_system_entity.dart',
+    'http.dart',
+    'http_date.dart',
+    'http_headers.dart',
+    'http_impl.dart',
+    'http_parser.dart',
+    'http_session.dart',
+    'io_resource_info.dart',
+    'io_sink.dart',
+    'io_service.dart',
+    'link.dart',
+    'platform.dart',
+    'platform_impl.dart',
+    'process.dart',
+    'service_object.dart',
+    'secure_server_socket.dart',
+    'secure_socket.dart',
+    'security_context.dart',
+    'socket.dart',
+    'stdio.dart',
+    'string_transformer.dart',
+    'websocket.dart',
+    'websocket_impl.dart',
+  ],
+}