Refactor print preview web ui

chrome/browser/resources/print_preview/data/capabilities_holder.js

+// 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.
+
+cr.define('print_preview', function() {
+  'use strict';
+
+  /**
+   * Mutable reference to a capabilities object.
+   * @constructor
+   */
+  function CapabilitiesHolder() {
+    /**
+     * Reference to the capabilities object.
+     * @type {print_preview.ChromiumCapabilities}
+     * @private
+     */
+    this.capabilities_ = null;
+  };
+
+  CapabilitiesHolder.prototype = {
+    /**
+     * @return {print_preview.ChromiumCapabilities} The instance held by the
+     *     holder.
+     */
+    get: function() {
+      return this.capabilities_;
+    },
+
+    /**
+     * @param {!print_preview.ChromiumCapabilities} New instance to put into the
+     *     holder.
+     */
+    set: function(capabilities) {
+      this.capabilities_ = capabilities;
+    }
+  };
+
+  // Export
+  return {
+    CapabilitiesHolder: CapabilitiesHolder
+  };
+});