[Icons NTP] Make Fast Local NTP render largeIconUrl instead of thumbnail, if available.

chrome/browser/resources/local_ntp/most_visited_single.js

 /* Copyright 2015 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. */
 
  // Single iframe for NTP tiles.
 (function() {
 'use strict';
 
 
 /**
@@ skipping 261 matching lines @@
   // TODO(fserb): remove this or at least change to mouseenter.
   tile.addEventListener('mouseover', function() {
     logEvent(LOG_TYPE.NTP_MOUSEOVER);
   });
 
   var title = tile.querySelector('.mv-title');
   title.innerText = data.title;
   title.style.direction = data.direction || 'ltr';
 
   var thumb = tile.querySelector('.mv-thumb');
-  if (data.thumbnailUrl) {
+  if (data.largeIconUrl || data.thumbnailUrl) {
     var img = document.createElement('img');
     img.title = data.title;
-    img.src = data.thumbnailUrl;
+    if (data.largeIconUrl) {
+      img.src = data.largeIconUrl;
+      img.classList.add('large-icon');
+    } else {
+      img.src = data.thumbnailUrl;
+      img.classList.add('thumbnail');
+    }
     loadedCounter += 1;
     img.addEventListener('load', countLoad);
+    if (data.largeIconUrl) {
+      img.addEventListener('load', function(ev) {
+        thumb.classList.add('large-icon-outer');
+      });
+    }
     img.addEventListener('error', countLoad);
     img.addEventListener('error', function(ev) {
       thumb.classList.add('failed-img');
       thumb.removeChild(img);
       logEvent(LOG_TYPE.NTP_THUMBNAIL_ERROR);
     });
     thumb.appendChild(img);
     logEvent(LOG_TYPE.NTP_THUMBNAIL_TILE);
   } else {
     thumb.classList.add('failed-img');
@@ skipping 48 matching lines @@
     var html = document.querySelector('html');
     html.dir = 'rtl';
   }
 
   window.addEventListener('message', handlePostMessage);
 };
 
 
 window.addEventListener('DOMContentLoaded', init);
 })();