chromeos: Refactor ash SystemTrayDelegate enterprise methods to mojo

ash/system/tray/system_tray_controller.cc

Index: ash/system/tray/system_tray_controller.cc
diff --git a/ash/system/tray/system_tray_controller.cc b/ash/system/tray/system_tray_controller.cc
index 8b40876cc23243a3fb00c52b738ae8d6d0a12a1e..5f3d07a08c30ca5d03089df12ab6e0671ea72e11 100644
--- a/ash/system/tray/system_tray_controller.cc
+++ b/ash/system/tray/system_tray_controller.cc
@@ -100,6 +100,11 @@ void SystemTrayController::ShowPublicAccountInfo() {
     system_tray_client_->ShowPublicAccountInfo();
 }
 
+void SystemTrayController::ShowEnterpriseInfo() {
+  if (system_tray_client_)
+    system_tray_client_->ShowEnterpriseInfo();
+}
+
 void SystemTrayController::ShowNetworkConfigure(const std::string& network_id) {
   if (system_tray_client_)
     system_tray_client_->ShowNetworkConfigure(network_id);
@@ -183,6 +188,14 @@ void SystemTrayController::SetUse24HourClock(bool use_24_hour) {
   Shell::Get()->system_tray_notifier()->NotifyDateFormatChanged();
 }
 
+void SystemTrayController::SetEnterpriseDomain(
+    const std::string& enterprise_domain,
+    bool active_directory_managed) {
+  enterprise_domain_ = enterprise_domain;
+  active_directory_managed_ = active_directory_managed;
+  Shell::Get()->system_tray_notifier()->NotifyEnterpriseDomainChanged();
+}
+
 void SystemTrayController::ShowUpdateIcon(mojom::UpdateSeverity severity,
                                           bool factory_reset_required,
                                           mojom::UpdateType update_type) {