MD Bookmarks: Support policies for disabling bookmark editing

chrome/browser/resources/md_bookmarks/reducers.js

Index: chrome/browser/resources/md_bookmarks/reducers.js
diff --git a/chrome/browser/resources/md_bookmarks/reducers.js b/chrome/browser/resources/md_bookmarks/reducers.js
index 7665d3522bc54cec9742dfb756e16b43328b6fa5..c4d142b35d5dc082f7e21af22dad23e61d243963 100644
--- a/chrome/browser/resources/md_bookmarks/reducers.js
+++ b/chrome/browser/resources/md_bookmarks/reducers.js
@@ -408,6 +408,10 @@ cr.define('bookmarks', function() {
         return /** @type {PreferencesState} */ (Object.assign({}, prefs, {
           incognitoAvailability: action.value,
         }));
+      case 'set-can-edit':
+        return /** @type {PreferencesState} */ (Object.assign({}, prefs, {
+          canEdit: action.value,
+        }));
       default:
         return prefs;
     }