Add storage manager overlay on Settings.

chrome/browser/resources/options/chromeos/storage_manager.js

+// Copyright 2016 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.
+
+cr.define('options', function() {
+  var Page = cr.ui.pageManager.Page;
+  var PageManager = cr.ui.pageManager.PageManager;
+
+  function StorageManager() {
+    Page.call(this, 'storage',
+              loadTimeData.getString('storageManagerPageTabTitle'),
+              'storageManagerPage');
+  }
+
+  cr.addSingletonGetter(StorageManager);
+
+  StorageManager.prototype = {
+    __proto__: Page.prototype,
+
+    /** @override */
+    initializePage: function() {
+      Page.prototype.initializePage.call(this);
+
+      $('storage-confirm').onclick = function() {
+        PageManager.closeOverlay();
+      };
+    }
+  };
+
+  return {
+    StorageManager: StorageManager
+  };
+});