[DevTools] Replace the target type with capabilities

third_party/WebKit/Source/devtools/front_end/timeline_model/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 1281 matching lines @@
         this._layerTreeModel._layerPainted(layerId, clipRect);
     }
 }
 
 /**
  * @param {!WebInspector.Target} target
  * @return {?WebInspector.LayerTreeModel}
  */
 WebInspector.LayerTreeModel.fromTarget = function(target)
 {
-    if (!target.isPage())
+    if (!target.hasBrowserCapability())
         return null;
 
     var model = /** @type {?WebInspector.LayerTreeModel} */ (target.model(WebInspector.LayerTreeModel));
     if (!model)
         model = new WebInspector.LayerTreeModel(target);
     return model;
 }