Add mojo structs for ScopedFD and ScopedHandle.

mojo/common/BUILD.gn

 # 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.
 
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 group("common") {
   public_deps = [
     ":common_base",
     ":common_custom_types",
   ]
 }
 
 mojom("common_custom_types") {
   sources = [
     "file.mojom",
     "file_path.mojom",
+    "platform_handle.mojom",
     "string16.mojom",
     "time.mojom",
     "unguessable_token.mojom",
     "values.mojom",
     "version.mojom",
   ]
 }
 
 component("common_base") {
   output_name = "mojo_common_lib"
@@ skipping 15 matching lines @@
   public_deps = [
     "//base",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
   ]
 }
 
 mojom("test_common_custom_types") {
   sources = [
     "test_common_custom_types.mojom",
+    "test_invalid_typemapped_type.mojom",
     "traits_test_service.mojom",
   ]
   public_deps = [
     ":common_custom_types",
   ]
 }
 
 test("mojo_common_unittests") {
   deps = [
     ":common",
@@ skipping 25 matching lines @@
     "//mojo/edk/test:run_all_perftests",
     "//mojo/public/cpp/test_support:test_utils",
     "//testing/gtest",
   ]
 }
 
 source_set("struct_traits") {
   sources = [
     "common_custom_types_struct_traits.cc",
     "common_custom_types_struct_traits.h",
+    "common_custom_types_struct_traits_posix.cc",
+    "common_custom_types_struct_traits_posix.h",
+    "common_custom_types_struct_traits_win.cc",
+    "common_custom_types_struct_traits_win.h",
+    "invalid_typemapped_type.h",
+    "platform_handle.h",
   ]
   deps = [
     ":common_custom_types_shared_cpp_sources",
     "//base:base",
     "//mojo/public/cpp/system",
   ]
 }