Add a passphrase dialog for managed user accounts.

chrome/browser/resources/managed_user_passphrase_dialog.css

+/* Copyright (c) 2013 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. */
+
+#managed-mode-passphrase-page {
+  min-width: 350px;
+}
+
+#managed-user-logo {
+  background-image: url('managed_user.png');
+  height: 68px;
+  width: 65px;
+}
+
+#instructions,
+#entry,
+#incorrect-passphrase-warning {
+  padding: 5px 15px;
+}
+
+#unlock {
+  float: right;

[James Hawkins, 2013/02/13 21:46:48]

Need to handle RTL.

[Adrian Kuegel, 2013/02/14 10:36:12]

I added rtl handling for that button and tested it with arabic language. But
this dialog will probably change anyway when we get feedback from the UI team.
So I would prefer to do polishing in a follow-up CL.

[James Hawkins, 2013/02/15 17:35:55]

This isn't a polish issue :-)  Please fix it.

[Adrian Kuegel, 2013/02/16 08:10:50]

But I did! That is what I meant with "I added rtl handling for that button". I
also tested it with arabic language. Should I send you another screenshot?

+}
+
+#buttons {
+  padding: 15px 15px;
+}
+
+#incorrect-passphrase-warning {
+  color: red;
+  font-weight: bold;
+}