[MD settings] show icon when content settings are controlled by an extension

ui/webui/resources/cr_elements/policy/cr_policy_pref_indicator.js

 // Copyright 2015 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.
 
 /**
  * @fileoverview Polymer element for indicating policies that apply to an
  * element controlling a settings preference.
  */
 Polymer({
   is: 'cr-policy-pref-indicator',
@@ skipping 30 matching lines @@
    * @param {!chrome.settingsPrivate.ControlledBy|undefined} controlledBy
    * @param {!chrome.settingsPrivate.Enforcement|undefined} enforcement
    * @return {CrPolicyIndicatorType} The indicator type based on |controlledBy|
    *     and |enforcement|.
    */
   getIndicatorTypeForPref_: function(controlledBy, enforcement) {
     if (enforcement == chrome.settingsPrivate.Enforcement.RECOMMENDED)
       return CrPolicyIndicatorType.RECOMMENDED;
     if (enforcement == chrome.settingsPrivate.Enforcement.ENFORCED) {
       switch (controlledBy) {
+        case chrome.settingsPrivate.ControlledBy.EXTENSION:
+          return CrPolicyIndicatorType.EXTENSION;
         case chrome.settingsPrivate.ControlledBy.PRIMARY_USER:
           return CrPolicyIndicatorType.PRIMARY_USER;
         case chrome.settingsPrivate.ControlledBy.OWNER:
           return CrPolicyIndicatorType.OWNER;
         case chrome.settingsPrivate.ControlledBy.USER_POLICY:
           return CrPolicyIndicatorType.USER_POLICY;
         case chrome.settingsPrivate.ControlledBy.DEVICE_POLICY:
           return CrPolicyIndicatorType.DEVICE_POLICY;
       }
     }
     return CrPolicyIndicatorType.NONE;
   },
 
   /**
    * @param {CrPolicyIndicatorType} indicatorType
    * @return {string} The tooltip text for |indicatorType|.
    * @private
    */
   getIndicatorTooltipForPref_: function(indicatorType) {
     var matches = this.pref && this.pref.value == this.pref.recommendedValue;
     return this.getIndicatorTooltip(
         indicatorType, this.pref.controlledByName || '', matches);
   },
 });