Timeline: get layers panel out of experiment

third_party/WebKit/Source/devtools/front_end/main/Main.js

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 87 matching lines @@
   _initializeExperiments(prefs) {
     Runtime.experiments.register('accessibilityInspection', 'Accessibility Inspection');
     Runtime.experiments.register('applyCustomStylesheet', 'Allow custom UI themes');
     Runtime.experiments.register('audits2', 'Audits 2.0', true);
     Runtime.experiments.register('autoAttachToCrossProcessSubframes', 'Auto-attach to cross-process subframes', true);
     Runtime.experiments.register('blackboxJSFramesOnTimeline', 'Blackbox JavaScript frames on Timeline', true);
     Runtime.experiments.register('colorContrastRatio', 'Contrast ratio line in color picker', true);
     Runtime.experiments.register('continueToFirstInvocation', 'Continue to first invocation', true);
     Runtime.experiments.register('emptySourceMapAutoStepping', 'Empty sourcemap auto-stepping');
     Runtime.experiments.register('inputEventsOnTimelineOverview', 'Input events on Timeline overview', true);
-    Runtime.experiments.register('layersPanel', 'Layers panel');
     Runtime.experiments.register('layoutEditor', 'Layout editor', true);
     Runtime.experiments.register('inspectTooltip', 'Dark inspect element tooltip');
     Runtime.experiments.register('liveSASS', 'Live SASS');
     Runtime.experiments.register('nodeDebugging', 'Node debugging', true);
     Runtime.experiments.register('persistence2', 'Persistence 2.0');
     Runtime.experiments.register('privateScriptInspection', 'Private script inspection');
     Runtime.experiments.register('requestBlocking', 'Request blocking', true);
     Runtime.experiments.register('resolveVariableNames', 'Resolve variable names');
     Runtime.experiments.register('timelineShowAllEvents', 'Show all events on Timeline', true);
     Runtime.experiments.register('timelineShowAllProcesses', 'Show all processes on Timeline', true);
@@ skipping 884 matching lines @@
    * @override
    * @return {?Element}
    */
   settingElement() {
     return UI.SettingsUI.createSettingCheckbox(
         Common.UIString('Show rulers'), Common.moduleSetting('showMetricsRulers'));
   }
 };
 
 new Main.Main();