DevTools: reformat front-end code to match chromium style.

third_party/WebKit/Source/devtools/front_end/animation/AnimationScreenshotPopover.js

 // Copyright (c) 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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @param {!Array.<!Image>} images
  */
 WebInspector.AnimationScreenshotPopover = function(images)
 {
     WebInspector.VBox.call(this, true);
     console.assert(images.length);
     this.registerRequiredCSS("animation/animationScreenshotPopover.css");
     this.contentElement.classList.add("animation-screenshot-popover");
     this._frames = images;
     for (var image of images) {
         this.contentElement.appendChild(image);
         image.style.display = "none";
     }
     this._currentFrame = 0;
     this._frames[0].style.display = "block";
     this._progressBar = this.contentElement.createChild("div", "animation-progress");
 };
 
 WebInspector.AnimationScreenshotPopover.prototype = {
+    /**
+     * @override
+     */
     wasShown: function()
     {
         this._rafId = this.contentElement.window().requestAnimationFrame(this._changeFrame.bind(this));
     },
 
+    /**
+     * @override
+     */
     willHide: function()
     {
         this.contentElement.window().cancelAnimationFrame(this._rafId);
         delete this._endDelay;
     },
 
     _changeFrame: function()
     {
         this._rafId = this.contentElement.window().requestAnimationFrame(this._changeFrame.bind(this));
 
         if (this._endDelay) {
             this._endDelay--;
             return;
         }
         this._showFrame = !this._showFrame;
         if (!this._showFrame)
             return;
 
         var numFrames = this._frames.length;
         this._frames[this._currentFrame % numFrames].style.display = "none";
         this._currentFrame++;
         this._frames[(this._currentFrame) % numFrames].style.display = "block";
         if (this._currentFrame % numFrames === numFrames - 1)
             this._endDelay = 50;
         this._progressBar.style.width = (this._currentFrame % numFrames + 1) / numFrames * 100 + "%";
     },
 
     __proto__: WebInspector.VBox.prototype
 };