Fixed apps uninstall in NTP.

chrome/browser/resources/ntp/apps.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.
 
 var MAX_APPS_PER_ROW = [];
 MAX_APPS_PER_ROW[LayoutMode.SMALL] = 4;
 MAX_APPS_PER_ROW[LayoutMode.NORMAL] = 6;
 
 function getAppsCallback(data) {
   logEvent('received apps');
@@ skipping 339 matching lines @@
     el.addEventListener('contextmenu', cr.ui.contextMenuHandler);
     el.addEventListener('keydown', cr.ui.contextMenuHandler);
     el.addEventListener('keyup', cr.ui.contextMenuHandler);
 
     Object.defineProperty(el, 'contextMenu', {
       get: function() {
         currentApp = app;
 
         $('apps-launch-command').label = app['name'];
         $('apps-options-command').canExecuteChange();
+        $('apps-uninstall-command').canExecuteChange();
 
         var launchTypeEl;
         if (el.getAttribute('app-id') === app['id']) {
           launchTypeEl = el;
         } else {
           appLinkSel = 'a[app-id=' + app['id'] + ']';
           launchTypeEl = el.querySelector(appLinkSel);
         }
 
         var launchType = launchTypeEl.getAttribute('launch-type');
@@ skipping 48 matching lines @@
 
   document.addEventListener('canExecute', function(e) {
     switch (e.command.id) {
       case 'apps-options-command':
         e.canExecute = currentApp && currentApp['options_url'];
         break;
       case 'apps-launch-command':
         e.canExecute = true;
         break;
       case 'apps-uninstall-command':
-        e.canExecute = currentApp && !currentApp['can_uninstall'];
+        e.canExecute = currentApp && currentApp['can_uninstall'];
         break;
     }
   });
 
   // Moves the element at position |from| in array |arr| to position |to|.
   function arrayMove(arr, from, to) {
     var element = arr.splice(from, 1);
     arr.splice(to, 0, element[0]);
   }
 
@@ skipping 476 matching lines @@
       a.href = localStrings.getString('web_store_url');
       a.style.backgroundImage = url('chrome://theme/IDR_WEBSTORE_ICON_16');
       a.className = 'item';
       return a;
     }
   };
 })();
 
 // Enable drag and drop reordering of the app launcher.
 var appDragAndDrop = new DragAndDropController(apps);