NTP: Add transitions.

chrome/browser/resources/ntp/most_visited.js

 // Copyright (c) 2010 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.
 
 // Dependencies that we should remove/formalize:
 // ../shared/js/class_list.js
 // util.js
 //
 // afterTransition
 // chrome.send
@@ skipping 561 matching lines @@
         a.textContent = item.title;
         a.style.backgroundImage = url('chrome://favicon/' + item.url);
         a.className = 'item';
         this.miniview.appendChild(span);
 
         if ((a.offsetLeft + a.offsetWidth) > this.miniview.offsetWidth) {
           this.miniview.removeChild(span);
           return;
         }
       }
+      updateMiniviewClipping(this.miniview);
     },
 
     handleClick_: function(e) {
       var target = e.target;
       if (target.classList.contains('pin')) {
         this.togglePinned_(getItem(target));
         e.preventDefault();
       } else if (target.classList.contains('remove')) {
         this.blacklist(getItem(target));
         e.preventDefault();
@@ skipping 14 matching lines @@
     handleKeyDown_: function(e) {
       if (!IS_MAC && e.keyCode == 46 || // Del
           IS_MAC && e.metaKey && e.keyCode == 8) { // Cmd + Backspace
         this.blacklist(e.target);
       }
     }
   };
 
   return MostVisited;
 })();