Add butter bar to login screen to show device enrollement info.

chrome/browser/chromeos/login/version_info_updater.h

Index: chrome/browser/chromeos/login/version_info_updater.h
diff --git a/chrome/browser/chromeos/login/version_info_updater.h b/chrome/browser/chromeos/login/version_info_updater.h
index f7df037da5e4e6335e3badd8cc20c77f7344c79a..ba650d3e912889163efc482c5d58b62efdd5afcb 100644
--- a/chrome/browser/chromeos/login/version_info_updater.h
+++ b/chrome/browser/chromeos/login/version_info_updater.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -29,6 +29,10 @@ class VersionInfoUpdater : policy::CloudPolicySubsystem::Observer {
     // Called when boot times label should be updated.
     virtual void OnBootTimesLabelTextUpdated(
         const std::string& boot_times_label_text) = 0;
+
+    // Called when the enterprise info notice should be updated.
+    virtual void OnEnterpriseInfoUpdated(
+        const std::string& enterprise_info) = 0;
   };
 
   explicit VersionInfoUpdater(Delegate* delegate);