ChromeOS: Implement Language Selection screen of material design OOBE.

chrome/browser/resources/chromeos/login/custom_elements_oobe.js

Index: chrome/browser/resources/chromeos/login/custom_elements_oobe.js
diff --git a/chrome/browser/resources/chromeos/login/custom_elements_oobe.js b/chrome/browser/resources/chromeos/login/custom_elements_oobe.js
index 347df43140e40a16dffeee1b7eec3f15e2c8089a..5ba20e496d1351e6de66f80a37467673892e0304 100644
--- a/chrome/browser/resources/chromeos/login/custom_elements_oobe.js
+++ b/chrome/browser/resources/chromeos/login/custom_elements_oobe.js
@@ -2,8 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// This inclusion should go first, as <{controller,host}-paring-screen> depend
-// of it.
+// This inclusion is types-only. No actual code to execute.
+<include src="oobe_types.js">
+
+// This inclusion should go before other non-trivial includes, as
+// <{controller,host}-paring-screen> depend of it.
 <include src="oobe-screen.js">
 
 <include src="controller-pairing-screen.js">
@@ -24,4 +27,5 @@
 <include src="oobe_buttons.js">
 <include src="oobe_card.js">
 <include src="oobe_dialog.js">
+<include src="oobe_i18n_dropdown.js">
 <include src="oobe_welcome.js">