DevTools: better visual feedback for hovered objects is Layers3DView

Source/devtools/front_end/timeline/LayerDetailsView.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 70 matching lines @@
     "layerForScrollbar": WebInspector.UIString("Layer for scrollbar."),
     "layerForScrollingContainer": WebInspector.UIString("Layer for scrolling container."),
     "layerForForeground": WebInspector.UIString("Layer for foreground."),
     "layerForBackground": WebInspector.UIString("Layer for background."),
     "layerForMask": WebInspector.UIString("Layer for mask."),
     "layerForVideoOverlay": WebInspector.UIString("Layer for video overlay.")
 };
 
 WebInspector.LayerDetailsView.prototype = {
     /**
-     * @param {?WebInspector.Layers3DView.ActiveObject} activeObject
+     * @param {?WebInspector.Layers3DView.Selection} selection
      */
-    setObject: function(activeObject)
+    setObject: function(selection)
     {
-        this._layer = activeObject ? activeObject.layer : null;
-        this._scrollRectIndex = activeObject ? activeObject.scrollRectIndex : null;
+        this._layer = selection ? selection.layer : null;
+        this._scrollRectIndex = selection ? selection.scrollRectIndex : null;
         if (this.isShowing())
             this.update();
     },
 
     wasShown: function()
     {
         WebInspector.View.prototype.wasShown.call(this);
         this.update();
     },
 
     /**
      * @param {number} index
      * @param {!Event} event
      */
     _onScrollRectClicked: function(index, event)
     {
         if (event.which !== 1)
             return;
-        this.dispatchEventToListeners(WebInspector.LayerDetailsView.Events.ObjectSelected, {layer: this._layer, scrollRectIndex: index});
+        this.dispatchEventToListeners(WebInspector.LayerDetailsView.Events.ObjectSelected, new WebInspector.Layers3DView.ScrollRectSelection(this._layer, index));
     },
 
     /**
      * @param {!LayerTreeAgent.ScrollRect} scrollRect
      * @param {number} index
      */
     _createScrollRectElement: function(scrollRect, index)
     {
         if (index)
             this._scrollRectsCell.createTextChild(", ");
@@ skipping 61 matching lines @@
             var text = WebInspector.LayerDetailsView.CompositingReasonDetail[compositingReasons[i]] || compositingReasons[i];
             // If the text is more than one word but does not terminate with period, add the period.
             if (/\s.*[^.]$/.test(text))
                 text += ".";
             list.createChild("li").textContent = text;
         }
     },
 
     __proto__: WebInspector.VBox.prototype
 }