DevTools: enable layers pane outside of experiements.

third_party/WebKit/Source/devtools/front_end/timeline/TimelineUIUtils.js

 /*
  * Copyright (C) 2013 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 1614 matching lines @@
     if (filmStripFrame) {
         var filmStripPreview = createElementWithClass("img", "timeline-filmstrip-preview");
         filmStripFrame.imageDataPromise().then(onGotImageData.bind(null, filmStripPreview));
         contentHelper.appendElementRow("", filmStripPreview);
         filmStripPreview.addEventListener("click", frameClicked.bind(null, filmStripFrame), false);
     }
     var durationInMillis = frame.endTime - frame.startTime;
     contentHelper.appendTextRow(WebInspector.UIString("FPS"), Math.floor(1000 / durationInMillis));
     contentHelper.appendTextRow(WebInspector.UIString("CPU time"), Number.millisToString(frame.cpuTime, true));
 
-    if (Runtime.experiments.isEnabled("layersPanel") && frame.layerTree) {
-        contentHelper.appendElementRow(WebInspector.UIString("Layer tree"),
-                                       WebInspector.Linkifier.linkifyUsingRevealer(frame.layerTree, WebInspector.UIString("show")));
-    }
-
     /**
      * @param {!Element} image
      * @param {?string} data
      */
     function onGotImageData(image, data)
     {
         if (data)
             image.src = "data:image/jpg;base64," + data;
     }
 
@@ skipping 495 matching lines @@
     case warnings.V8Deopt:
         span.appendChild(WebInspector.linkifyURLAsNode("https://github.com/GoogleChrome/devtools-docs/issues/53",
             WebInspector.UIString("Not optimized"), undefined, true));
         span.createTextChild(WebInspector.UIString(": %s", eventData["deoptReason"]));
         break;
     default:
         console.assert(false, "Unhandled TimelineModel.WarningType");
     }
     return span;
 }