Remove references to obsolete TOUCH_UI build - extension sample

chrome/common/extensions/docs/examples/extensions/plugin_settings/domui/js/cr.js

 // Copyright (c) 2011 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.
 
 const cr = (function() {
 
   /**
    * Whether we are using a Mac or not.
    * @type {boolean}
    */
   const isMac = /Mac/.test(navigator.platform);
 
   /**
    * Whether this is on the Windows platform or not.
    * @type {boolean}
    */
   const isWindows = /Win/.test(navigator.platform);
 
   /**
    * Whether this is on chromeOS or not.
    * @type {boolean}
    */
   const isChromeOS = /CrOS/.test(navigator.userAgent);
 
   /**
-   * Whether this is on touchui build or not.
-   * @type {boolean}
-   */
-  const isTouch = /Touch/.test(navigator.userAgent);
-
-  /**
    * Whether this is on vanilla Linux (not chromeOS).
    * @type {boolean}
    */
   const isLinux = /Linux/.test(navigator.userAgent);
 
   /**
    * Whether this uses GTK or not.
    * @type {boolean}
    */
   const isGTK = /GTK/.test(chrome.toolkit);
@@ skipping 309 matching lines @@
     };
   }
 
   return {
     addSingletonGetter: addSingletonGetter,
     isChromeOS: isChromeOS,
     isMac: isMac,
     isWindows: isWindows,
     isLinux: isLinux,
     isViews: isViews,
-    isTouch: isTouch,
     enablePlatformSpecificCSSRules: enablePlatformSpecificCSSRules,
     define: define,
     defineProperty: defineProperty,
     PropertyKind: PropertyKind,
     createUid: createUid,
     getUid: getUid,
     dispatchSimpleEvent: dispatchSimpleEvent,
     dispatchPropertyChange: dispatchPropertyChange,
 
     /**
      * The document that we are currently using.
      * @type {!Document}
      */
     get doc() {
       return doc;
     },
     withDoc: withDoc,
     Event: CrEvent
   };
 })();