Files.app: Make delete button on the toolbar standard button instead of CommandButton.

ui/file_manager/file_manager/foreground/js/ui/file_manager_ui.js

 // Copyright 2014 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.
 
 /**
  * The root of the file manager's view managing the DOM of Files.app.
  *
  * @param {!HTMLElement} element Top level element of Files.app.
  * @param {!LaunchParam} launchParam Launch param.
  * @constructor
@@ skipping 110 matching lines @@
   this.textContextMenu = util.queryDecoratedElement(
       '#text-context-menu', cr.ui.Menu);
 
   /**
    * Location line.
    * @type {LocationLine}
    */
   this.locationLine = null;
 
   /**
-   * The toolbar button to cancel selection.
+   * The toolbar which contains controls.
    * @type {!HTMLElement}
    * @const
    */
-  this.cancelSelectionButton =
-      queryRequiredElement(this.element, '#cancel-selection-button');
-
-  /**
-   * The wrapper for the toolbar button to cancel selection.
-   * @type {!HTMLElement}
-   * @const
-   */
-  this.cancelSelectionButtonWrapper =
-      queryRequiredElement(this.element, '#cancel-selection-button-wrapper');
-
-  /**
-   * The label showing how many files are selected.
-   * @type {!HTMLElement}
-   * @const
-   */
-  this.filesSelectedLabel =
-      queryRequiredElement(this.element, '#files-selected-label');
+  this.toolbar = queryRequiredElement(this.element, '.dialog-header');
 
   /**
    * The navigation list.
    * @type {!HTMLElement}
    * @const
    */
   this.dialogNavigationList =
       queryRequiredElement(this.element, '.dialog-navigation-list');
 
   /**
@@ skipping 285 matching lines @@
     },
 
     handleSplitterDragEnd: function(e) {
       Splitter.prototype.handleSplitterDragEnd.apply(this, arguments);
       this.ownerDocument.documentElement.classList.remove('col-resize');
     }
   };
 
   customSplitter.decorate(splitterElement);
 };