Revert of chromeos: Remove SystemTrayDelegate::GetIMEManagedMessage()

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
index fc12774fbf513ccaec6bfad767261f6ecf118f40..274bed9805a4009615b978cb75176c6367826128 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
@@ -47,6 +47,7 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/features.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/grit/generated_resources.h"
 #include "chromeos/login/login_state.h"
 #include "chromeos/network/portal_detector/network_portal_detector.h"
 #include "components/google/core/browser/google_util.h"
@@ -60,6 +61,8 @@
 #include "ui/base/ime/chromeos/extension_ime_util.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
 #include "ui/base/ime/chromeos/input_method_util.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/time_format.h"
 #include "ui/chromeos/events/pref_names.h"
 #include "ui/chromeos/ime/input_method_menu_item.h"
 #include "ui/chromeos/ime/input_method_menu_manager.h"
@@ -242,6 +245,13 @@
     property.selected = menu_list[i].is_selection_item_checked;
     list->push_back(property);
   }
+}
+
+base::string16 SystemTrayDelegateChromeOS::GetIMEManagedMessage() {
+  auto ime_state = input_method::InputMethodManager::Get()->GetActiveIMEState();
+  return ime_state->GetAllowedInputMethods().empty()
+             ? base::string16()
+             : l10n_util::GetStringUTF16(IDS_OPTIONS_CONTROLLED_SETTING_POLICY);
 }
 
 ash::NetworkingConfigDelegate*