native_support service: SynchronousInterfacePtr conversion in tests.

services/native_support/BUILD.gn

 # Copyright 2015 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/mojo_application.gni")
 
 mojo_native_application("native_support") {
   sources = [
     "main.cc",
     "make_pty_pair.cc",
@@ skipping 34 matching lines @@
 
   deps = [
     "//base",
     "//mojo/application",
     "//mojo/application:test_support",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
     "//mojo/services/files/cpp:files_impl",
     "//mojo/services/files/interfaces",
     "//mojo/services/native_support/interfaces",
+    "//mojo/services/native_support/interfaces:interfaces_sync",
   ]
 
-  data_deps = [ ":native_support($default_toolchain)" ]
+  data_deps = [
+    ":native_support($default_toolchain)",
+  ]
 }