[DevTools] Auto completion for proxy uses proxy target object

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 212 matching lines @@
         function callFunctionCallback(callback, object, wasThrown)
         {
             callback({
                 object: object,
                 wasThrown: wasThrown
             });
         }
     },
 
     /**
-     * @param {function(this:Object, ...)} functionDeclaration
+     * @template T
+     * @param {function(this:Object, ...):T} functionDeclaration
      * @param {!Array<!RuntimeAgent.CallArgument>|undefined} args
-     * @param {function(*)} callback
+     * @param {function(T)} callback
      */
     callFunctionJSON: function(functionDeclaration, args, callback)
     {
         throw "Not implemented";
     },
 
     /**
      * @param {function(this:Object, ...):T} functionDeclaration
      * @param {!Array<!RuntimeAgent.CallArgument>|undefined} args
      * @return {!Promise<T>}
@@ skipping 1412 matching lines @@
     {
         if (!this._cachedDescription) {
             var children = this._children();
             this._cachedDescription = "{" + this._formatValue(children[0].value) + " => " + this._formatValue(children[1].value) + "}";
         }
         return this._cachedDescription;
     },
 
     __proto__: WebInspector.LocalJSONObject.prototype
 }