[DevTools] Auto completion for proxy uses proxy target object

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

 /*
  * Copyright (C) 2012 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 508 matching lines @@
          * @this {WebInspector.ExecutionContext}
          */
         function evaluated(result, wasThrown)
         {
             if (!result || wasThrown) {
                 completionsReadyCallback([]);
                 return;
             }
 
             /**
+             * @param {?WebInspector.RemoteObject} object
+             * @return {!Promise<?WebInspector.RemoteObject>}
+             */
+            function extractTarget(object)
+            {
+                if (!object)
+                    return Promise.resolve(/** @type {?WebInspector.RemoteObject} */(null));
+                if (object.type !== "object" || object.subtype !== "proxy")
+                    return Promise.resolve(/** @type {?WebInspector.RemoteObject} */(object));
+                return object.getOwnPropertiesPromise().then(extractTargetFromProperties).then(extractTarget);
+            }
+
+            /**
+             * @param {!{properties: ?Array<!WebInspector.RemoteObjectProperty>, internalProperties: ?Array<!WebInspector.RemoteObjectProperty>}} properties
+             * @return {?WebInspector.RemoteObject}
+             */
+            function extractTargetFromProperties(properties)
+            {
+                var internalProperties = properties.internalProperties || [];
+                var target = internalProperties.find(property => property.name === "[[Target]]");
+                return target ? target.value : null;
+            }
+
+            /**
              * @param {string=} type
+             * @return {!Object}
              * @suppressReceiverCheck
-             * @this {WebInspector.ExecutionContext}
+             * @this {Object}
              */
             function getCompletions(type)
             {
                 var object;
                 if (type === "string")
                     object = new String("");
                 else if (type === "number")
                     object = new Number(0);
                 else if (type === "boolean")
                     object = new Boolean(false);
@@ skipping 12 matching lines @@
                             if (isArray && /^[0-9]/.test(names[i]))
                                 continue;
                             resultSet[names[i]] = true;
                         }
                     }
                 } catch (e) {
                 }
                 return resultSet;
             }
 
-            if (result.type === "object" || result.type === "function")
-                result.callFunctionJSON(getCompletions, [WebInspector.RemoteObject.toCallArgument(result.subtype)], receivedPropertyNames.bind(this));
-            else if (result.type === "string" || result.type === "number" || result.type === "boolean")
-                this.evaluate("(" + getCompletions + ")(\"" + result.type + "\")", "completion", false, true, true, false, false, receivedPropertyNamesFromEval.bind(this));
+            /**
+             * @param {?WebInspector.RemoteObject} object
+             * @this {WebInspector.ExecutionContext}
+             */
+            function completionsForObject(object)
+            {
+                if (!object)
+                    receivedPropertyNames.call(this, null);
+                else if (object.type === "object")
+                    object.callFunctionJSON(getCompletions, [WebInspector.RemoteObject.toCallArgument(object.subtype)], receivedPropertyNames.bind(this));
+                else if (object.type === "string" || object.type === "number" || object.type === "boolean")
+                    this.evaluate("(" + getCompletions + ")(\"" + result.type + "\")", "completion", false, true, true, false, false, receivedPropertyNamesFromEval.bind(this));
+            }
+
+            extractTarget(result).then(completionsForObject.bind(this));
         }
 
         /**
          * @param {?WebInspector.RemoteObject} notRelevant
          * @param {boolean} wasThrown
          * @param {?RuntimeAgent.RemoteObject=} result
          * @this {WebInspector.ExecutionContext}
          */
         function receivedPropertyNamesFromEval(notRelevant, wasThrown, result)
         {
+            this.target().runtimeAgent().releaseObjectGroup("completion");
             if (result && !wasThrown)
-                receivedPropertyNames.call(this, result.value);
+                receivedPropertyNames.call(this, /** @type {!Object} */(result.value));
             else
                 completionsReadyCallback([]);
         }
 
         /**
+         * @param {?Object} propertyNames
          * @this {WebInspector.ExecutionContext}
          */
         function receivedPropertyNames(propertyNames)
         {
             this.target().runtimeAgent().releaseObjectGroup("completion");
             if (!propertyNames) {
                 completionsReadyCallback([]);
                 return;
             }
             var includeCommandLineAPI = (!dotNotation && !bracketNotation);
@@ skipping 218 matching lines @@
     /**
      * @param {string} listenerType
      */
     setListenerType: function(listenerType)
     {
         this._listenerType = listenerType;
     },
 
     __proto__: WebInspector.SDKObject.prototype
 }