Devtools Animations: Timeline interactions change the underlying style

Source/devtools/front_end/elements/AnimationsSidebarPane.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.ElementsSidebarPane}
  */
 WebInspector.AnimationsSidebarPane = function(stylesPane)
 {
     WebInspector.ElementsSidebarPane.call(this, WebInspector.UIString("Animations"));
     this._stylesPane = stylesPane;
 
     this.headerElement = createElementWithClass("div", "animationsHeader");
     this._showSubtreeSetting = WebInspector.settings.createSetting("showSubtreeAnimations", true);
     this._showSubtreeSetting.addChangeListener(this._showSubtreeSettingChanged.bind(this));
     this._globalControls = new WebInspector.AnimationsSidebarPane.GlobalAnimationControls(this._showSubtreeSetting);
     this.headerElement.appendChild(this._globalControls.element);
 
     this._emptyElement = createElement("div");
     this._emptyElement.className = "info";
     this._emptyElement.textContent = WebInspector.UIString("No Animations");
     this.animationsElement = createElement("div");
     this.animationsElement.appendChild(this._emptyElement);
 
     this._animationSections = [];
 
     this.bodyElement.appendChild(this.headerElement);
-    this._timeline = new WebInspector.AnimationTimeline();
+    this._timeline = new WebInspector.AnimationTimeline(this._stylesPane);
     this._timeline.show(this.bodyElement);
     this.bodyElement.appendChild(this.animationsElement);
 }
 
 /**
  * @param {!WebInspector.Setting} setting
  * @return {!Element}
  */
 WebInspector.AnimationsSidebarPane._showSubtreeAnimationsCheckbox = function(setting)
 {
@@ skipping 438 matching lines @@
         this._playbackRate = playbackRate;
         this._updateControls();
         // Only apply to main target.
         var target = WebInspector.targetManager.mainTarget();
         if (target)
             target.pageAgent().setAnimationsPlaybackRate(this._paused ? 0 : this._playbackRate);
     },
 
     __proto__: WebInspector.StatusBar.prototype
 }