Add cr_policy_indicator for settings controls

chrome/browser/resources/settings/prefs/prefs.js

Index: chrome/browser/resources/settings/prefs/prefs.js
diff --git a/chrome/browser/resources/settings/prefs/prefs.js b/chrome/browser/resources/settings/prefs/prefs.js
index 98c82f78b5c4543a20fc1dd601e5bfabe98b010c..5e89860ac703d766ede1a8af6de82236a6bff57d 100644
--- a/chrome/browser/resources/settings/prefs/prefs.js
+++ b/chrome/browser/resources/settings/prefs/prefs.js
@@ -236,17 +236,12 @@ function ListPrefWrapper(prefObj) {
      * @private
      */
     setPref_: function(newPrefObj) {
-      // Check if the pref exists already in the Polymer |prefs| object.
-      if (this.get(newPrefObj.key, this.prefs)) {
-        // Update just the value, notifying listeners of the change.
-        this.set('prefs.' + newPrefObj.key + '.value', newPrefObj.value);
-      } else {
-        // Add the pref to |prefs|. cr.exportPath doesn't use Polymer.Base.set,
-        // which is OK because the nested property update events aren't useful.
-        cr.exportPath(newPrefObj.key, newPrefObj, this.prefs);
-        // Notify listeners of the change at the preference key.
-        this.notifyPath('prefs.' + newPrefObj.key, newPrefObj);
-      }
+      // Add the pref object to |prefs| if necessary and set it. Note: we need
+      // to always set the entire object, not just the value, in case any policy
+      // or other attributes change.
+      cr.exportPath(newPrefObj.key, newPrefObj, this.prefs);
+      // Notify listeners of the change at the preference key.
+      this.notifyPath('prefs.' + newPrefObj.key, newPrefObj);

[michaelpg, 2015/09/16 18:58:52]

You'll need to rebase this on https://codereview.chromium.org/1346833003/ (or
rather, you can just remove this change and that CL does it for you).

[stevenjb, 2015/09/16 21:33:53]

Acknowledged.

     },
 
     /**