Color the VR 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 81 matching lines @@
   color: white;
   font-size: 24px;
   max-width: 192px;
   opacity: 0;
   overflow: hidden;
   text-align: center;
   transition: opacity 150ms ease-in-out;
   white-space: nowrap;
 }
 
-#back .button {
+#back .button,
+#forward .button {
   background-image: url(../../../../ui/webui/resources/images/vr_back.svg);
 }
 
 #reload .button {
   background-image: url(../../../../ui/webui/resources/images/vr_reload.svg);
 }
 
 #forward .button {
-  background-image: url(../../../../ui/webui/resources/images/vr_back.svg);

[bshe, 2017/01/03 17:05:56]

optional nit: I found the old version is more readable. :) 

   transform: scaleX(-1);
 }
 
 #reload-ui-button {
   background-color: #555;
   color: white;
   font-size: 24px;
   padding: 12px;
 }
 
@@ skipping 22 matching lines @@
   white-space: nowrap;
   width: 512px;
 }
 
 #omni-content {
   align-items: center;
   display: flex;
   max-width: 448px;
 }
 
-#omni .connection-security {
+.omni-icon {
+  -webkit-mask-size: 50px;
   display: none;
   flex: none;
   height: 50px;
   margin-right: 10px;
   width: 50px;
 }
 
+#omni-info-icon {
+  -webkit-mask-image: url(../../../../ui/webui/resources/images/i_circle.svg);
+  background-color: rgb(90, 90, 90);
+}
+
+#omni-lock-icon {
+  -webkit-mask-image: url(../../../../ui/webui/resources/images/lock.svg);
+  background-color: rgb(11, 128, 67);
+}
+
+#omni-warning-icon {
+  -webkit-mask-image: url(../../../../ui/webui/resources/images/warning.svg);
+  background-color: rgb(199, 56, 33);
+}
+
 #omni #url {
   color: #252525;
   font-size: 34px;
   overflow: hidden;
   white-space: nowrap;
 }
 
 #omni #path {
   color: #868686;
 }
 
 #omni.hide {
   margin-bottom: 0;
   margin-top: 60px;
   opacity: 0;
 }
 
 #omni.loading {
   border: 4px solid rgb(86, 203, 255);
 }
 
 #omni.idle {
   background-color: #ececec;
 }
 
 #omni.idle #domain {
   color: black;
 }