[DevTools] Replace the target type with capabilities

third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js

 /*
  * Copyright (C) 2009 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 489 matching lines @@
     eventListeners: function()
     {
         return new Promise(eventListeners.bind(this));
         /**
          * @param {function(?)} fulfill
          * @param {function(*)} reject
          * @this {WebInspector.RemoteObject}
          */
         function eventListeners(fulfill, reject)
         {
-            if (!this.target().isPage()) {
+            if (!this.target().hasBrowserCapability()) {
                 // TODO(kozyatinskiy): figure out how this should work for |window| when there is no DOMDebugger.
                 fulfill([]);
                 return;
             }
 
             if (!this._objectId) {
                 reject(null);
                 return;
             }
 
@@ skipping 988 matching lines @@
     },
 
     /**
      * @return {!WebInspector.RemoteObject}
      */
     object: function()
     {
         return this._object;
     }
 }