Fix html viewer.

mojo/services/html_viewer/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/mojo.gni")
 import("//mojo/public/mojo_application.gni")
 
 source_set("lib") {
   sources = [
     "ax_provider_impl.cc",
@@ skipping 66 matching lines @@
     "//ui/native_theme",
     "//url",
   ]
 
   public_deps = [
     "//third_party/WebKit/public:blink",
   ]
 }
 
 # GYP version: mojo/mojo_services.gypi:html_viewer
-shared_library("html_viewer") {
+mojo_native_application("html_viewer") {
   sources = [
     "html_viewer.cc",
   ]
   deps = [
     ":lib",
   ]
 }
 
 test("tests") {
   output_name = "html_viewer_unittests"
   sources = [
     "ax_provider_impl_unittest.cc",
   ]
   deps = [
     ":lib",
     "//base/test:run_all_unittests",
   ]
 }