MD Bookmarks: Save and close bookmark edit dialog on 'enter' key press.

chrome/browser/resources/md_bookmarks/edit_dialog.js

 // Copyright 2017 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.
 
 Polymer({
   is: 'bookmarks-edit-dialog',
 
+  behaviors: [
+    Polymer.IronA11yKeysBehavior,
+  ],
+
   properties: {
     /** @private {BookmarkNode} */
     editItem_: Object,
 
     /** @private */
     isFolder_: Boolean,
 
     /** @private */
     titleValue_: String,
 
     /** @private */
     urlValue_: String,
   },
 
+  keyBindings: {
+    'enter': 'onSaveButtonTap_',
+  },
+
   /** @param {BookmarkNode} editItem */
   showEditDialog: function(editItem) {
     this.editItem_ = editItem;
     this.isFolder_ = !editItem.url;
 
     this.titleValue_ = editItem.title;
     if (!this.isFolder_)
       this.urlValue_ = assert(editItem.url);
 
     this.$.dialog.showModal();
   },
 
   /**
    * @param {boolean} isFolder
    * @return {string}
    * @private
    */
   getDialogTitle_: function(isFolder) {
     return loadTimeData.getString(
         isFolder ? 'renameFolderTitle' : 'editBookmarkTitle');
   },
 
   /** @private */
   onSaveButtonTap_: function() {
-    // TODO(tsergeant): Save changes when enter is pressed.
     // TODO(tsergeant): Verify values.
     var edit = {'title': this.titleValue_};
     if (!this.isFolder_)
       edit['url'] = this.urlValue_;
 
     chrome.bookmarks.update(this.editItem_.id, edit);
     this.$.dialog.close();
   },
 
   /** @private */
   onCancelButtonTap_: function() {
     this.$.dialog.cancel();
   },
 });