DevTools: Animations: Remember the playback rate

third_party/WebKit/Source/devtools/front_end/animation/AnimationTimeline.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.
 /**
  * @implements {SDK.TargetManager.Observer}
  * @unrestricted
  */
 Animation.AnimationTimeline = class extends UI.VBox {
   constructor() {
     super(true);
@@ skipping 304 matching lines @@
     delete this._selectedGroup;
     if (this._scrubberPlayer)
       this._scrubberPlayer.cancel();
     delete this._scrubberPlayer;
     this._currentTime.textContent = '';
     this._updateControlButton();
   }
 
   _reset() {
     this._clearTimeline();
-    if (this._allPaused) {
-      this._playbackRate = 1;
+    if (this._allPaused)
       this._togglePauseAll();
-    } else {
-      this._setPlaybackRate(1);
-    }
+    else
+      this._setPlaybackRate(this._playbackRate);
+
     for (var group of this._groupBuffer)
       group.release();
     this._groupBuffer = [];
     this._previewMap.clear();
     this._previewContainer.removeChildren();
     this._popoverHelper.hidePopover();
     this._renderGrid();
   }
 
   /**
@@ skipping 393 matching lines @@
   static parse(text) {
     var match = text.match(/^steps\((\d+), (start|middle)\)$/);
     if (match)
       return new Animation.AnimationTimeline.StepTimingFunction(parseInt(match[1], 10), match[2]);
     match = text.match(/^steps\((\d+)\)$/);
     if (match)
       return new Animation.AnimationTimeline.StepTimingFunction(parseInt(match[1], 10), 'end');
     return null;
   }
 };