Move divider detection and creation onto TimelineUIUtils instance

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 102 matching lines @@
     this._createStatusBarItems();
 
     this._topPane = new WebInspector.SplitView(true, false);
     this._topPane.element.id = "timeline-overview-panel";
     this._topPane.show(this.element);
     this._topPane.addEventListener(WebInspector.SplitView.Events.SidebarSizeChanged, this._sidebarResized, this);
     this._topPane.setResizable(false);
     this._createRecordingOptions();
 
     // Create top overview component.
-    this._overviewPane = new WebInspector.TimelineOverviewPane(this._model);
+    this._overviewPane = new WebInspector.TimelineOverviewPane(this._model, this._uiUtils);
     this._overviewPane.addEventListener(WebInspector.TimelineOverviewPane.Events.WindowChanged, this._onWindowChanged.bind(this));
     this._overviewPane.show(this._topPane.mainElement());
 
     this._createFileSelector();
     this._registerShortcuts();
 
     WebInspector.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.WillReloadPage, this._willReloadPage, this);
     WebInspector.resourceTreeModel.addEventListener(WebInspector.ResourceTreeModel.EventTypes.Load, this._loadEventFired, this);
 
     // Create top level properties splitter.
@@ skipping 1307 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._hiddenRecords[record.type()];
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }