[MD Bookmarks] Remove the bookmarks-sidebar element.

chrome/browser/resources/md_bookmarks/app.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-app',
 
   behaviors: [
     bookmarks.StoreClient,
   ],
@@ skipping 68 matching lines @@
   initializeSplitter_: function() {
     var splitter = this.$.splitter;
     cr.ui.Splitter.decorate(splitter);
     var splitterTarget = this.$.sidebar;
 
     // The splitter persists the size of the left component in the local store.
     if (LOCAL_STORAGE_TREE_WIDTH_KEY in window.localStorage) {
       splitterTarget.style.width =
           window.localStorage[LOCAL_STORAGE_TREE_WIDTH_KEY];
     }
-    this.sidebarWidth_ = splitterTarget.getComputedStyleValue('width');
+    this.sidebarWidth_ =
+        /** @type {string} */ (getComputedStyle(splitterTarget).width);
 
     splitter.addEventListener('resize', function(e) {
       window.localStorage[LOCAL_STORAGE_TREE_WIDTH_KEY] =
           splitterTarget.style.width;
       this.updateSidebarWidth_();
     }.bind(this));
 
     splitter.addEventListener('dragmove', this.boundUpdateSidebarWidth_);
     window.addEventListener('resize', this.boundUpdateSidebarWidth_);
   },
 
   /** @private */
   updateSidebarWidth_: function() {
-    this.sidebarWidth_ = this.$.sidebar.getComputedStyleValue('width');
+    this.sidebarWidth_ =
+        /** @type {string} */ (getComputedStyle(this.$.sidebar).width);
   },
 
   /** @private */
   searchTermChanged_: function() {
     if (!this.searchTerm_)
       return;
 
     chrome.bookmarks.search(this.searchTerm_, function(results) {
       var ids = results.map(function(node) {
         return node.id;
       });
       this.dispatch(bookmarks.actions.setSearchResults(ids));
     }.bind(this));
   },
 
   /** @private */
   closedFoldersStateChanged_: function() {
     window.localStorage[LOCAL_STORAGE_CLOSED_FOLDERS_KEY] =
         JSON.stringify(Array.from(this.closedFoldersState_));
   },
 });