DevTools: brush up paint marker rendering, sort experiments, restore event markers on the overview.

third_party/WebKit/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 40 matching lines @@
     this._millisecondsToRecordAfterLoadEvent = 3000;
     this._toggleRecordAction =
         /** @type {!UI.Action }*/ (UI.actionRegistry.action('timeline.toggle-recording'));
 
     /** @type {!Array<!TimelineModel.TimelineModelFilter>} */
     this._filters = [];
     if (!Runtime.experiments.isEnabled('timelineShowAllEvents')) {
       this._filters.push(Timeline.TimelineUIUtils.visibleEventsFilter());
       this._filters.push(new TimelineModel.ExcludeTopLevelFilter());
     }
+    if (!Runtime.experiments.isEnabled('timelinePaintTimingMarkers'))
+      this._filters.push(Timeline.TimelineUIUtils.paintEventsFilter());
 
     /** @type {?Timeline.PerformanceModel} */
     this._performanceModel = null;
     /** @type {?Timeline.PerformanceModel} */
     this._pendingPerformanceModel = null;
 
     this._cpuThrottlingManager = new Components.CPUThrottlingManager();
 
     this._viewModeSetting =
         Common.settings.createSetting('timelineViewMode', Timeline.TimelinePanel.ViewMode.FlameChart);
@@ skipping 1230 matching lines @@
         return true;
       case 'timeline.jump-to-next-frame':
         panel._jumpToFrame(1);
         return true;
     }
     return false;
   }
 };
 
 Timeline.TimelinePanel._traceProviderSettingSymbol = Symbol('traceProviderSetting');