Add login screen locale and input method device policies

ash/common/system/tray/system_tray_delegate.h

Index: ash/common/system/tray/system_tray_delegate.h
diff --git a/ash/common/system/tray/system_tray_delegate.h b/ash/common/system/tray/system_tray_delegate.h
index 2c19d6d82d186c80b3591e83f0e4abf0458affbe..eb99683ab4b4713264980bb505f39abcf2b8b2ee 100644
--- a/ash/common/system/tray/system_tray_delegate.h
+++ b/ash/common/system/tray/system_tray_delegate.h
@@ -141,6 +141,9 @@ class ASH_EXPORT SystemTrayDelegate {
   // Returns a list of properties for the currently selected IME.
   virtual void GetCurrentIMEProperties(IMEPropertyInfoList* list);
 
+  // Returns a non-empty string if IMEs are managed by policy.
+  virtual base::string16 GetIMEManagedMessage();
+
   // Switches to the selected input method.
   virtual void SwitchIME(const std::string& ime_id);