Fixing iframe jank in the local omnibox popup.

chrome/browser/resources/local_ntp/local_ntp.css

 /* Copyright 2013 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. */
 body {
   background-attachment: fixed !important;
   background-color: white;
   cursor: default;
   margin: 0;
   overflow: hidden;
 }
@@ skipping 285 matching lines @@
   position: absolute;
   right: 13px;
   text-align: left;
   z-index: -1;
 }
 
 #attribution img {
   display: block;
 }
 
-#suggestions-box {
+.suggestions-box {
   border-bottom: 1px #d9d9d9 solid;
   padding-bottom: 6px;
   padding-top: 6px;
 }
 
-#suggestions-box-container {
-  position: absolute;
-  top: 0;
-  width: 100%;
-}
-
 .suggestion {
   background: -webkit-image-set(
       url(images/page_icon.png) 1x,
       url(images/2x/page_icon.png) 2x) no-repeat;
   border-radius: 2px;
   padding-bottom: 2px;
   padding-top: 3px;
+  height: 22px;
   white-space: nowrap;
 }
 
 .search {
   background: -webkit-image-set(
       url(images/search_icon.png) 1x,
       url(images/2x/search_icon.png) 2x) no-repeat;
 }
 
-.suggestion:hover {
+.hovered {
   background-color: #eee;
 }
 
-.selected,
-.selected:hover {
+.selected {
   background-color: rgba(181, 213, 255, 0.5);
 }
 
-.contents {
+.suggestion-contents {
   -webkit-padding-start: 26px;
   -webkit-user-select: none;
   border: none;
   height: 22px;
   overflow: hidden;
+  position: absolute;
 }
 
-/* Styling for native suggestions, hidden by the shadow DOM. */
-.chrome_url {
-  color: rgb(0, 153, 51);
+.pending-suggestions-container {
+  display: none;
 }
-
-.chrome_title {
-  color: #666;
-}