chromeos: Refactor ash SystemTrayDelegate enterprise methods to mojo

ash/system/enterprise/tray_enterprise.cc

Index: ash/system/enterprise/tray_enterprise.cc
diff --git a/ash/system/enterprise/tray_enterprise.cc b/ash/system/enterprise/tray_enterprise.cc
index 0127d36e5210e948525f74234ee043d7bc9077a1..cd340e113059e9d6b975c8097c3df9b92c5d4179 100644
--- a/ash/system/enterprise/tray_enterprise.cc
+++ b/ash/system/enterprise/tray_enterprise.cc
@@ -7,13 +7,34 @@
 #include "ash/login_status.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "ash/shell.h"
+#include "ash/strings/grit/ash_strings.h"
 #include "ash/system/tray/label_tray_view.h"
-#include "ash/system/tray/system_tray_delegate.h"
+#include "ash/system/tray/system_tray_controller.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "base/logging.h"
 #include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "ui/base/l10n/l10n_util.h"
 
 namespace ash {
+namespace {
+
+base::string16 GetEnterpriseMessage() {
+  SystemTrayController* controller = Shell::Get()->system_tray_controller();
+
+  // Active Directory devices do not show a domain name.
+  if (controller->active_directory_managed())
+    return l10n_util::GetStringUTF16(IDS_ASH_ENTERPRISE_DEVICE_MANAGED);
+
+  if (!controller->enterprise_domain().empty()) {
+    return l10n_util::GetStringFUTF16(
+        IDS_ASH_ENTERPRISE_DEVICE_MANAGED_BY,
+        base::UTF8ToUTF16(controller->enterprise_domain()));
+  }
+  return base::string16();
+}
+
+}  // namespace
 
 TrayEnterprise::TrayEnterprise(SystemTray* system_tray)
     : SystemTrayItem(system_tray, UMA_ENTERPRISE), tray_view_(nullptr) {
@@ -25,10 +46,8 @@ TrayEnterprise::~TrayEnterprise() {
 }
 
 void TrayEnterprise::UpdateEnterpriseMessage() {
-  base::string16 message =
-      Shell::Get()->system_tray_delegate()->GetEnterpriseMessage();
   if (tray_view_)
-    tray_view_->SetMessage(message);
+    tray_view_->SetMessage(GetEnterpriseMessage());
 }
 
 views::View* TrayEnterprise::CreateDefaultView(LoginStatus status) {
@@ -51,7 +70,7 @@ void TrayEnterprise::OnEnterpriseDomainChanged() {
 }
 
 void TrayEnterprise::OnViewClicked(views::View* sender) {
-  Shell::Get()->system_tray_delegate()->ShowEnterpriseInfo();
+  Shell::Get()->system_tray_controller()->ShowEnterpriseInfo();
 }
 
 }  // namespace ash