[MD Bookmarks] Add Delete and Copy URL for Material Bookmarks.

chrome/browser/resources/md_bookmarks/list.js

 // Copyright 2016 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-list',
 
   properties: {
     /** @type {BookmarkTreeNode} */
     selectedNode: Object,
+
+    /** @type {BookmarkTreeNode} */
+    menuItem_: Object,
   },
 
   listeners: {
-    'toggle-menu': 'onToggleMenu_'
+    'open-item-menu': 'onOpenItemMenu_',
   },
 
   /**
    * @param {Event} e
    * @private
    */
-  onToggleMenu_: function(e) {
+  onOpenItemMenu_: function(e) {
+    this.menuItem_ = e.detail.item;
     var menu = /** @type {!CrActionMenuElement} */ (
         this.$.dropdown);
     menu.showAt(/** @type {!Element} */ (e.detail.target));
   },
 
   // TODO(jiaxi): change these dummy click event handlers later.
   /** @private */
-  onEditTap_: function() {
-    this.closeDropdownMenu_();
-  },
+  onEditTap_: function() { this.closeDropdownMenu_(); },
 
   /** @private */
   onCopyURLTap_: function() {
+    var idList = [this.menuItem_.id];
+    chrome.bookmarkManagerPrivate.copy(idList, function() {
+      // TODO(jiaxi): Add toast later.
+    });
     this.closeDropdownMenu_();
   },
 
   /** @private */
   onDeleteTap_: function() {
     this.closeDropdownMenu_();

[calamity, 2017/01/04 06:57:44]

For consistency, move this to the end of the method.

[jiaxi, 2017/01/04 22:44:00]

Done.

+    if (this.menuItem_.children) {
+      chrome.bookmarks.removeTree(this.menuItem_.id, function() {
+        // TODO(jiaxi): Add toast later.
+      }.bind(this));
+    } else {
+      chrome.bookmarks.remove(this.menuItem_.id, function() {
+        // TODO(jiaxi): Add toast later.
+      }.bind(this));
+    }
   },
 
   /** @private */
   closeDropdownMenu_: function() {
     var menu = /** @type {!CrActionMenuElement} */ (
         this.$.dropdown);
     menu.close();
   }
 });