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

ui/webui/resources/cr_elements/policy/cr_policy_pref_behavior.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 Behavior for policy controlled settings prefs.
  */
 
 /** @polymerBehavior */
 var CrPolicyPrefBehavior = {
   /**
+   * Is the |pref| controlled by something that prevents user control of the
+   * preference.
    * @param {!chrome.settingsPrivate.PrefObject} pref
-   * @return {boolean} True if the pref is controlled by an enforced policy.
+   * @return {boolean} True if the pref is enforced.
    */
-  isPrefPolicyControlled: function(pref) {
-    return pref.enforcement == chrome.settingsPrivate.Enforcement.ENFORCED &&
-        pref.controlledBy != chrome.settingsPrivate.ControlledBy.EXTENSION;
+  isPrefEnforced: function(pref) {
+    return pref.enforcement == chrome.settingsPrivate.Enforcement.ENFORCED;
   },
 
   /**
    * @param {!chrome.settingsPrivate.ControlledBy|undefined} controlledBy
    * @param {!chrome.settingsPrivate.Enforcement|undefined} enforcement
    * @return {CrPolicyIndicatorType} The indicator type based on |controlledBy|
    *     and |enforcement|.
    */
   getIndicatorType: function(controlledBy, enforcement) {
     if (enforcement == chrome.settingsPrivate.Enforcement.RECOMMENDED)
       return CrPolicyIndicatorType.RECOMMENDED;
     if (enforcement == chrome.settingsPrivate.Enforcement.ENFORCED) {
       switch (controlledBy) {
         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;
+        case chrome.settingsPrivate.ControlledBy.EXTENSION:
+          return CrPolicyIndicatorType.EXTENSION;

[Dan Beam, 2017/02/25 00:13:41]

please show me screenshots of situations like a <controlled-*> or <settings-*>
thing with a pref={{}} that also has a nearby <extension-controlled-indicator>
without duplicate indications (i.e. no puzzle piece and tooltip AND a "[Name] is
controlling this setting" inline UI right by eachother)

[dschuyler, 2017/02/28 00:15:18]

Done off-line.

       }
     }
     return CrPolicyIndicatorType.NONE;
   },
 };