[inspector] exposed builtins for injected script source

src/inspector/injected-script-source.js

Index: src/inspector/injected-script-source.js
diff --git a/src/inspector/injected-script-source.js b/src/inspector/injected-script-source.js
index 6ec737d3773d08cdbec24a937a0831c1148f822c..8215cdce54ede528cd79a9a38b942666c6165acd 100644
--- a/src/inspector/injected-script-source.js
+++ b/src/inspector/injected-script-source.js
@@ -38,12 +38,6 @@
 (function (InjectedScriptHost, inspectedGlobalObject, injectedScriptId) {
 
 /**
- * Protect against Object overwritten by the user code.
- * @suppress {duplicate}
- */
-var Object = /** @type {function(new:Object, *=)} */ ({}.constructor);
-
-/**
  * @param {!Array.<T>} array
  * @param {...} var_args
  * @template T
@@ -187,7 +181,7 @@ var InjectedScript = function()
 InjectedScriptHost.nullifyPrototype(InjectedScript);
 
 /**
- * @type {!Object.<string, boolean>}
+ * @type {!Object<string, boolean>}
  * @const
  */
 InjectedScript.primitiveTypes = {
@@ -373,7 +367,7 @@ InjectedScript.prototype = {
         if (InjectedScriptHost.subtype(object) === "proxy")
             return null;
         try {
-            return Object.getPrototypeOf(object);
+            return InjectedScriptHost.getPrototypeOf(object);
         } catch (e) {
             return null;
         }
@@ -420,7 +414,7 @@ InjectedScript.prototype = {
 
                 var descriptor;
                 try {
-                    descriptor = Object.getOwnPropertyDescriptor(o, property);
+                    descriptor = InjectedScriptHost.getOwnPropertyDescriptor(o, property);
                     InjectedScriptHost.nullifyPrototype(descriptor);
                     var isAccessorProperty = descriptor && ("get" in descriptor || "set" in descriptor);
                     if (accessorPropertiesOnly && !isAccessorProperty)
@@ -496,15 +490,13 @@ InjectedScript.prototype = {
                         return descriptors;
                 } else {
                     // First call Object.keys() to enforce ordering of the property descriptors.
-                    if (!process(o, Object.keys(o)))
+                    if (!process(o, InjectedScriptHost.keys(o)))
                         return descriptors;
-                    if (!process(o, Object.getOwnPropertyNames(o)))
-                        return descriptors;
-                }
-                if (Object.getOwnPropertySymbols) {
-                    if (!process(o, Object.getOwnPropertySymbols(o)))
+                    if (!process(o, InjectedScriptHost.getOwnPropertyNames(o)))
                         return descriptors;
                 }
+                if (!process(o, InjectedScriptHost.getOwnPropertySymbols(o)))
+                    return descriptors;
 
                 if (ownProperties) {
                     var proto = this._objectPrototype(o);