[inspector] Increased chances of successful InjectedScriptSource compilation

src/inspector/injected-script-source.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 139 matching lines @@
 /**
  * DOM Attributes which have observable side effect on getter, in the form of
  *   {interfaceName1: {attributeName1: true,
  *                     attributeName2: true,
  *                     ...},
  *    interfaceName2: {...},
  *    ...}
  * @type {!Object<string, !Object<string, boolean>>}
  * @const
  */
-var domAttributesWithObservableSideEffectOnGet = nullifyObjectProto({});
-domAttributesWithObservableSideEffectOnGet["Request"] = nullifyObjectProto({});
-domAttributesWithObservableSideEffectOnGet["Request"]["body"] = true;
-domAttributesWithObservableSideEffectOnGet["Response"] = nullifyObjectProto({});
-domAttributesWithObservableSideEffectOnGet["Response"]["body"] = true;
+var domAttributesWithObservableSideEffectOnGet = {
+    Request: { body: true, __proto__: null },
+    Response: { body: true, __proto__: null },
+    __proto__: null
+}
 
 /**
  * @param {!Object} object
  * @param {string} attribute
  * @return {boolean}
  */
 function doesAttributeHaveObservableSideEffectOnGet(object, attribute)
 {
     for (var interfaceName in domAttributesWithObservableSideEffectOnGet) {
         var interfaceFunction = inspectedGlobalObject[interfaceName];
         // Call to instanceOf looks safe after typeof check.
         var isInstance = typeof interfaceFunction === "function" && /* suppressBlacklist */ object instanceof interfaceFunction;
         if (isInstance)
             return attribute in domAttributesWithObservableSideEffectOnGet[interfaceName];
     }
     return false;
 }
 
 /**
  * @constructor
  */
 var InjectedScript = function()
 {
 }
+InjectedScriptHost.nullifyPrototype(InjectedScript);
 
 /**
  * @type {!Object.<string, boolean>}
  * @const
  */
 InjectedScript.primitiveTypes = {
     "undefined": true,
     "boolean": true,
     "number": true,
     "string": true,
@@ skipping 886 matching lines @@
             return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
         }
         return string.substr(0, maxLength) + "\u2026";
     },
 
     __proto__: null
 }
 
 return injectedScript;
 })