Fixes color capability for HP printers.

chrome/browser/resources/print_preview/data/cloud_capabilities.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';
 
   /**
    * Capabilities of a cloud-based print destination.
    * @param {print_preview.CollateCapability} collateCapability Print
@@ skipping 265 matching lines @@
    * @type {!RegExp}
    * @const
    */
   ColorCapability.COLOR_REGEX = /(.*color.*|.*rgb.*|.*cmy.*|true)/i;
 
   /**
    * Regular expression that matches a black-white option.
    * @type {!RegExp}
    * @const
    */
-  ColorCapability.BW_REGEX = /(.*gray.*|.*mono.*|.*black.*|false)/i;
+  ColorCapability.BW_REGEX = /(.*gray.*|.*mono.*|.*black.*|false|grey_k)/i;
 
   ColorCapability.prototype = {
     __proto__: CloudCapability.prototype,
 
     /** @return {string} Identifier of the color option. */
     get colorOption() {
       return this.colorOption_;
     },
 
     /** @return {string} Identifier of the black-white option. */
@@ skipping 107 matching lines @@
 
   // Export
   return {
     CloudCapabilities: CloudCapabilities,
     CollateCapability: CollateCapability,
     ColorCapability: ColorCapability,
     CopiesCapability: CopiesCapability,
     DuplexCapability: DuplexCapability
   };
 });