Fixing iframe jank in the local omnibox popup.

chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css

 /* Copyright 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. */
 
 body {
   background-color: white;
   cursor: default;
   margin: 0;
   overflow: hidden;
 }
 
-#suggestionsBox {
+.suggestions-box {
   border-bottom: 1px #d9d9d9 solid;
   padding-bottom: 6px;
   padding-top: 6px;
 }
 
 .suggestion {
   -webkit-border-radius: 2px;
   background: -webkit-image-set(
       url('images/page_icon.png') 1x,
       url('images/2x/page_icon.png') 2x) no-repeat;
   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 {
   -webkit-padding-start: 26px;
   -webkit-user-select: none;
   border: 0;
   height: 22px;
   overflow: hidden;
-  width: 100%;
+  position: absolute;
 }
 
-/* Styling for native suggestions, hidden by the shadow DOM. */
-.chrome_url {
-  color: rgb(0, 153, 51);
+.pending-container {
+  display: none;
 }
-
-.chrome_title {
-  color: #666;
-}