Switch controlled settings indicators to inlined SVGs.

ui/webui/resources/css/controlled_indicator.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. */
 
 /* Controlled setting indicator and bubble. */
 
 .controlled-setting-with-label input:disabled + span {
   color: #999;
 }
 
 .controlled-setting-indicator {
   -webkit-margin-end: 0.3em;
 }
 
 .controlled-setting-indicator:not([controlled-by]) {
   display: none;
 }
 
-.controlled-setting-indicator[controlled-by='policy'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_MANDATORY);
+.controlled-setting-indicator[controlled-by] > div {
+  background-position: 50%;
+  background-size: 18px;
+}
+
+.controlled-setting-indicator:-webkit-any([controlled-by='recommended'],
+    [controlled-by='hasRecommendation']) > div,
+    .controlled-setting-indicator[controlled-by='policy'] > div {
+  background-image: url(../images/business.svg);
 }
 
 .controlled-setting-indicator[controlled-by='owner'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_OWNER);
+  background-image: url(../images/account_circle.svg);
 }
 
 .controlled-setting-indicator[controlled-by='extension'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_EXTENSION);
+  background-image: url(../images/extension.svg);
 }
 
+<if expr="chromeos">
 .controlled-setting-indicator[controlled-by='shared'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_SHARED);
+  background-image: url(../images/group.svg);
 }
+</if>
 
 .controlled-setting-indicator[controlled-by='child-custodian'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_CHILD);
+  background-image: url(../images/account_child_invert.svg);
 }
 
 .controlled-setting-indicator[controlled-by='supervised-user-custodian'] > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_SUPERVISED);
-}
-
-.controlled-setting-indicator:-webkit-any([controlled-by='recommended'],
-    [controlled-by='hasRecommendation']) > div {
-  background-image: url(chrome://theme/IDR_CONTROLLED_SETTING_MANDATORY);
+  background-image: url(../images/supervisor_account.svg);
 }
 
 .controlled-setting-bubble-action {
   padding: 0 !important;
 }
 
 .controlled-setting-bubble-header {
   margin-top: 3px;
 }
 
@@ skipping 31 matching lines @@
 .controlled-setting-bubble-extension-disable-button {
   bottom: 0;
   position: absolute;
   right: 0;
 }
 
 html[dir='rtl'] .controlled-setting-bubble-extension-disable-button {
   left: 0;
   right: auto;
 }