Fix omnibox security icons.

chrome/browser/resources/vr_shell/vr_shell_ui.css

 /* Copyright 2016 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. */
 
 html {
   background-color: rgba(255, 255, 255, 0);
 }
 
 #ui {
   left: 0;
@@ skipping 134 matching lines @@
   width: 512px;
 }
 
 #omni-content {
   align-items: center;
   display: flex;
   max-width: 448px;
 }
 
 #omni .connection-security {
+  display: none;
+  flex: none;
   height: 50px;
   margin-right: 10px;
   width: 50px;
 }
 
 #omni #url {
   color: #252525;
   font-size: 34px;
   overflow: hidden;
   white-space: nowrap;
@@ skipping 13 matching lines @@
   border: 4px solid rgb(86, 203, 255);
 }
 
 #omni.idle {
   background-color: #ececec;
 }
 
 #omni.idle #domain {
   color: black;
 }