Implement the new wallpaper manager launcher window.

chrome/browser/resources/chromeos/wallpaper_manager/js/main.js

Index: chrome/browser/resources/chromeos/wallpaper_manager/js/main.js
diff --git a/chrome/browser/resources/chromeos/wallpaper_manager/js/main.js b/chrome/browser/resources/chromeos/wallpaper_manager/js/main.js
new file mode 100644
index 0000000000000000000000000000000000000000..c6f2edc91c72c9c33ea216dfc9d00d71a912b0f8
--- /dev/null
+++ b/chrome/browser/resources/chromeos/wallpaper_manager/js/main.js
@@ -0,0 +1,14 @@
+// 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.
+
+function init() {
+  window.addEventListener('load',
+      windowStateManager.saveStates.bind(windowStateManager));
+  window.addEventListener('focus',
+      windowStateManager.saveStates.bind(windowStateManager));
+  window.addEventListener('unload',
+      windowStateManager.restoreStates.bind(windowStateManager));
+}
+
+document.addEventListener('DOMContentLoaded', init);