mash: Change CastConfigDelegate to a mojoified CastConfigClient.

ash/common/mojo_interface_factory.cc

Index: ash/common/mojo_interface_factory.cc
diff --git a/ash/common/mojo_interface_factory.cc b/ash/common/mojo_interface_factory.cc
index 22c02c4644f2393d08a6bd76dc4c57f5c12df686..e359a741b1a700e5b55404310c33f86b170db1d3 100644
--- a/ash/common/mojo_interface_factory.cc
+++ b/ash/common/mojo_interface_factory.cc
@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "ash/common/cast_config_controller.h"
 #include "ash/common/shelf/shelf_controller.h"
 #include "ash/common/shutdown_controller.h"
 #include "ash/common/system/locale/locale_notification_controller.h"
@@ -24,6 +25,10 @@ namespace ash {
 
 namespace {
 
+void BindCastConfigOnMainThread(mojom::CastConfigRequest request) {
+  WmShell::Get()->cast_config()->BindRequest(std::move(request));
+}
+
 void BindLocaleNotificationControllerOnMainThread(
     mojom::LocaleNotificationControllerRequest request) {
   WmShell::Get()->locale_notification_controller()->BindRequest(
@@ -65,6 +70,8 @@ namespace mojo_interface_factory {
 void RegisterInterfaces(
     service_manager::InterfaceRegistry* registry,
     scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner) {
+  registry->AddInterface(base::Bind(&BindCastConfigOnMainThread),
+                         main_thread_task_runner);
   registry->AddInterface(
       base::Bind(&BindLocaleNotificationControllerOnMainThread),
       main_thread_task_runner);