[DevTools] Do not expose agents on Target

third_party/WebKit/Source/devtools/front_end/layers/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 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @unrestricted
  */
 Layers.LayerTreeModel = class extends SDK.SDKModel {
-  constructor(target) {
-    super(target);
-    this._layerTreeAgent = target.layerTreeAgent();
-    target.registerLayerTreeDispatcher(new Layers.LayerTreeDispatcher(this));
+  /**
+   * @param {!SDK.Target} target
+   * @param {!Protocol.Dispatcher} dispatcher
+   */
+  constructor(target, dispatcher) {
+    super(target, dispatcher);
+    this._layerTreeAgent = dispatcher.layerTreeAgent();
+    dispatcher.registerLayerTreeDispatcher(new Layers.LayerTreeDispatcher(this));
     this._paintProfilerModel = /** @type {!SDK.PaintProfilerModel} */ (target.model(SDK.PaintProfilerModel));
     var resourceTreeModel = target.model(SDK.ResourceTreeModel);
     if (resourceTreeModel) {
       resourceTreeModel.addEventListener(
           SDK.ResourceTreeModel.Events.MainFrameNavigated, this._onMainFrameNavigated, this);
     }
     /** @type {?SDK.LayerTreeBase} */
     this._layerTree = null;
   }
 
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   /**
    * @override
    * @param {!Protocol.LayerTree.LayerId} layerId
    * @param {!Protocol.DOM.Rect} clipRect
    */
   layerPainted(layerId, clipRect) {
     this._layerTreeModel._layerPainted(layerId, clipRect);
   }
 };