Devtools Animations: Correctly sync scrubber when first animation ended

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

 // Copyright (c) 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.
 
 
 /**
  * @constructor
  * @extends {WebInspector.SDKModel}
  * @param {!WebInspector.Target} target
  */
@@ skipping 753 matching lines @@
         /**
          * @param {?Protocol.Error} error
          * @param {number} currentTime
          * @return {number}
          */
         function callback(error, currentTime)
         {
             return !error ? currentTime : 0;
         }
 
-        return this.target().animationAgent().getCurrentTime(this._animations[0].id(), callback).catchException(0);
+        var longestAnim = null;
+        for (var anim of this._animations) {
+            if (!longestAnim || anim.endTime() > longestAnim.endTime())
+                longestAnim = anim;
+        }
+        return this.target().animationAgent().getCurrentTime(longestAnim.id(), callback).catchException(0);
     },
 
     /**
      * @param {!WebInspector.AnimationModel.AnimationGroup} group
      * @return {boolean}
      */
     _matches: function(group)
     {
         /**
          * @param {!WebInspector.AnimationModel.Animation} anim
@@ skipping 153 matching lines @@
         if (!this._capturing)
             return;
 
         delete this._stopTimer;
         delete this._endTime;
         this._requests = [];
         this._capturing = false;
         this._target.pageAgent().stopScreencast();
     }
 }