DevTools: Remove unused frontend code

Source/devtools/front_end/sdk/LayerTreeModel.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 1113 matching lines @@
      * @return {?WebInspector.Target}
      */
     target: function()
     {
         return this._target;
     }
 };
 
 /**
  * @constructor
- * @extends {WebInspector.DeferredLayerTree}
- * @param {?WebInspector.Target} target
- * @param {!Array.<!LayerTreeAgent.Layer>} layers
- */
-WebInspector.DeferredAgentLayerTree = function(target, layers)
-{
-    WebInspector.DeferredLayerTree.call(this, target);
-    this._layers = layers;
-}
-
-WebInspector.DeferredAgentLayerTree.prototype = {
-    /**
-     * @param {function(!WebInspector.LayerTreeBase)} callback
-     */
-    resolve: function(callback)
-    {
-        var result = new WebInspector.AgentLayerTree(this._target);
-        result.setLayers(this._layers, callback.bind(null, result));
-    },
-
-    __proto__: WebInspector.DeferredLayerTree.prototype
-};
-
-/**
- * @constructor
  * @implements {LayerTreeAgent.Dispatcher}
  * @param {!WebInspector.LayerTreeModel} layerTreeModel
  */
 WebInspector.LayerTreeDispatcher = function(layerTreeModel)
 {
     this._layerTreeModel = layerTreeModel;
 }
 
 WebInspector.LayerTreeDispatcher.prototype = {
     /**
      * @param {!Array.<!LayerTreeAgent.Layer>=} layers
      */
     layerTreeDidChange: function(layers)
     {
         this._layerTreeModel._layerTreeChanged(layers || null);
     },
 
     /**
      * @param {!LayerTreeAgent.LayerId} layerId
      * @param {!DOMAgent.Rect} clipRect
      */
     layerPainted: function(layerId, clipRect)
     {
         this._layerTreeModel._layerPainted(layerId, clipRect);
     }
 }