Add a policy to hide the Web Store on new tabs.

chrome/browser/resources/ntp4/apps_page.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('ntp', function() {
   'use strict';
 
   var APP_LAUNCH = {
     // The histogram buckets (keep in sync with extension_constants.h).
     NTP_APPS_MAXIMIZED: 0,
@@ skipping 650 matching lines @@
       this.insertApp(appData, true);
     },
 
     /**
      * Similar to appendApp, but it respects the app_launch_ordinal field of
      * |appData|.
      * @param {Object} appData The data that describes the app.
      * @param {boolean} animate Whether to animate the insertion.
      */
     insertApp: function(appData, animate) {
+      // Don't show the web store icon if policy so dictates.
+      if (appData.is_webstore &&
+          loadTimeData.getBoolean('isWebStoreIconHidden')) {
+        return;
+      }
+
       var index = this.tileElements_.length;
       for (var i = 0; i < this.tileElements_.length; i++) {
         if (appData.app_launch_ordinal <
             this.tileElements_[i].firstChild.appData.app_launch_ordinal) {
           index = i;
           break;
         }
       }
 
       this.addTileAt(new App(appData), index, animate);
@@ skipping 213 matching lines @@
       app.setupNotification_(notification);
   }
 
   return {
     APP_LAUNCH: APP_LAUNCH,
     appNotificationChanged: appNotificationChanged,
     AppsPage: AppsPage,
     launchAppAfterEnable: launchAppAfterEnable,
   };
 });