[Media Router] Convert to use typemaps for media_router.mojom.

chrome/test/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("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 4388 matching lines @@
       "../browser/media/router/presentation_service_delegate_impl_unittest.cc",
     ]
     deps += [ "//chrome/browser/media/router:test_support" ]
     if (!is_android) {
       sources += [
         # TODO(crbug.com/646627):
         # Move media_router_ui_service_factory_unittest.cc to chrome/browser/ui.
         "../browser/media/router/media_router_ui_service_factory_unittest.cc",
         "../browser/media/router/mojo/media_router_mojo_impl_unittest.cc",
         "../browser/media/router/mojo/media_router_mojo_metrics_unittest.cc",
-        "../browser/media/router/mojo/media_router_type_converters_unittest.cc",
         "../browser/ui/toolbar/media_router_action_controller_unittest.cc",
         "../browser/ui/toolbar/media_router_action_unittest.cc",
         "../browser/ui/toolbar/media_router_contextual_menu_unittest.cc",
         "../browser/ui/webui/media_router/cast_modes_with_media_sources_unittest.cc",
         "../browser/ui/webui/media_router/media_cast_mode_unittest.cc",
         "../browser/ui/webui/media_router/media_router_dialog_controller_impl_unittest.cc",
         "../browser/ui/webui/media_router/media_router_ui_unittest.cc",
         "../browser/ui/webui/media_router/media_router_web_ui_test.cc",
         "../browser/ui/webui/media_router/media_router_web_ui_test.h",
         "../browser/ui/webui/media_router/media_router_webui_message_handler_unittest.cc",
@@ skipping 752 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }