[inspector] Increased chances of successful InjectedScriptSource compilation

src/inspector/injected_script_externs.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @interface */
 function InjectedScriptHostClass()
 {
 }
 
 /**
  * @param {*} obj
+ */
+InjectedScriptHostClass.prototype.nullifyPrototype = function(obj) {}
+
+/**
+ * @param {*} obj
  * @return {string}
  */
 InjectedScriptHostClass.prototype.internalConstructorName = function(obj) {}
 
 /**
  * @param {*} obj
  * @param {function()|undefined} func
  * @return {boolean}
  */
 InjectedScriptHostClass.prototype.formatAccessorsAsProperties = function(obj, func) {}
@@ skipping 35 matching lines @@
  * @return {!Object}
  */
 InjectedScriptHostClass.prototype.proxyTargetValue = function(object) {}
 
 /** @type {!InjectedScriptHostClass} */
 var InjectedScriptHost;
 /** @type {!Window} */
 var inspectedGlobalObject;
 /** @type {number} */
 var injectedScriptId;