Color the VR omnibox security icons.

chrome/browser/resources/vr_shell/vr_shell_ui.css

Index: chrome/browser/resources/vr_shell/vr_shell_ui.css
diff --git a/chrome/browser/resources/vr_shell/vr_shell_ui.css b/chrome/browser/resources/vr_shell/vr_shell_ui.css
index 77c6cb516ef503c0fa4f85df8e9d1ccb9149b6e6..bb0b549bd5bec6a5adf9c6b8dfe36f1feeafb986 100644
--- a/chrome/browser/resources/vr_shell/vr_shell_ui.css
+++ b/chrome/browser/resources/vr_shell/vr_shell_ui.css
@@ -99,7 +99,8 @@ html {
   white-space: nowrap;
 }
 
-#back .button {
+#back .button,
+#forward .button {
   background-image: url(../../../../ui/webui/resources/images/vr_back.svg);
 }
 
@@ -108,7 +109,6 @@ html {
 }
 
 #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);
 }
 
@@ -151,7 +151,8 @@ html {
   max-width: 448px;
 }
 
-#omni .connection-security {
+.omni-icon {
+  -webkit-mask-size: 50px;
   display: none;
   flex: none;
   height: 50px;
@@ -159,6 +160,21 @@ html {
   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;