Devtools[LayoutEditor]: Rework layout-editor workflow

Source/devtools/front_end/screencast/ScreencastView.js

 /*
  * Copyright (C) 2013 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 661 matching lines @@
         const gutterSize = 30;
         const bordersSize = WebInspector.ScreencastView._bordersSize;
         var width = this.element.offsetWidth - bordersSize - gutterSize;
         var height = this.element.offsetHeight - bordersSize - gutterSize - WebInspector.ScreencastView._navBarHeight;
         return { width: width, height: height };
     },
 
     /**
      * @override
      * @param {boolean} enabled
-     * @param {boolean} inspectUAShadowDOM
+     * @param {?string} mode
      * @param {!DOMAgent.HighlightConfig} config
      * @param {function(?Protocol.Error)=} callback
      */
-    setInspectModeEnabled: function(enabled, inspectUAShadowDOM, config, callback)
+    setInspectModeEnabled: function(enabled, mode, config, callback)
     {
         this._inspectModeConfig = enabled ? config : null;
         if (callback)
             callback(null);
     },
 
     /**
      * @override
      * @param {!PageAgent.FrameId} frameId
      */
@@ skipping 181 matching lines @@
           return;
         this._maxDisplayedProgress = progress;
         this._displayProgress(progress);
     },
 
     _displayProgress: function(progress)
     {
         this._element.style.width = (100 * progress) + "%";
     }
 };