JS cleanup for cr_elements

ui/webui/resources/cr_elements/cr_collapse/cr_collapse.js

-/* Copyright 2015 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. */
+// Copyright 2015 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.
 
 /**
  * @fileoverview
  * `cr-collapse` creates a collapsible block of content. By default, the content
  * will be collapsed. Use `opened` or `toggle()` to show/hide the content.
  * `cr-collapse` adjusts the height/width of the collapsible element to
  * show/hide the content. So avoid putting padding/margin/border on the
  * collapsible directly, and instead put a `div` inside and style that.
  *
  * When a `cr-collapse` is toggled, its `opened` field changes immediately, but
@@ skipping 42 matching lines @@
   toggle: function() {
     this.$.collapse.toggle();
   },
 
   ready: function() {
     this.$.collapse.addEventListener(
         'core-resize', this.handleResize_.bind(this));
     this.handleResize_();
   },
 });