[inspector] nullifyObjectPrototype -> InjectedScriptHost.nullifyPrototype

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 65 matching lines @@
  * @return {string}
  */
 function toStringDescription(obj)
 {
     if (typeof obj === "number" && obj === 0 && 1 / obj < 0)
         return "-0"; // Negative zero.
     return toString(obj);
 }
 
 /**
- * @param {T} obj
- * @return {T}
- * @template T
- */
-function nullifyObjectProto(obj)
-{
-    if (obj && typeof obj === "object")
-        obj.__proto__ = null;
-    return obj;
-}
-
-/**
  * @param {number|string} obj
  * @return {boolean}
  */
 function isUInt32(obj)
 {
     if (typeof obj === "number")
         return obj >>> 0 === obj && (obj > 0 || 1 / obj > 0);
     return "" + (obj >>> 0) === obj;
 }
 
@@ skipping 340 matching lines @@
                         // Silent catch.
                         continue;
                     }
                 }
 
                 descriptor.name = name;
                 if (o === object)
                     descriptor.isOwn = true;
                 if (isSymbol(property))
                     descriptor.symbol = property;
-                descriptor = nullifyObjectProto(descriptor);
                 if (!addPropertyIfNeeded(descriptors, descriptor))
                     return false;
             }
             return true;
         }
 
         if (propertyNamesOnly) {
             for (var i = 0; i < propertyNamesOnly.length; ++i) {
                 var name = propertyNamesOnly[i];
                 for (var o = object; this._isDefined(o); o = this._objectPrototype(/** @type {!Object} */ (o))) {
@@ skipping 571 matching lines @@
                 preview.overflow = true;
             return;
         }
         preview.entries = [];
         var entriesThreshold = 5;
         for (var i = 0; i < entries.length; ++i) {
             if (preview.entries.length >= entriesThreshold) {
                 preview.overflow = true;
                 break;
             }
-            var entry = nullifyObjectProto(entries[i]);
+            var entry = InjectedScriptHost.nullifyPrototype(entries[i]);

[kozy, 2017/03/24 20:23:04]

I couldn't add a test since we return entry with nullified prototype from
backend and this call is for more safety only.

             var previewEntry = {
                 value: generateValuePreview(entry.value),
                 __proto__: null
             };
             if ("key" in entry)
                 previewEntry.key = generateValuePreview(entry.key);
             push(preview.entries, previewEntry);
         }
 
         /**
@@ skipping 24 matching lines @@
             return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
         }
         return string.substr(0, maxLength) + "\u2026";
     },
 
     __proto__: null
 }
 
 return injectedScript;
 })