Revert of [proxies] Better print for proxies in d8

src/js/collection.js

 // Copyright 2012 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.
 
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
@@ skipping 82 matching lines @@
 
 function GetExistingHash(key) {
   if (%_IsSmi(key)) {
     return ComputeIntegerHash(key, 0);
   }
   if (IS_STRING(key)) {
     var field = %_StringGetRawHashField(key);
     if ((field & 1 /* Name::kHashNotComputedMask */) === 0) {
       return field >>> 2 /* Name::kHashShift */;
     }
-  } else if (IS_RECEIVER(key) && !IS_PROXY(key) && !IS_GLOBAL(key)) {
+  } else if (IS_RECEIVER(key) && !%_IsJSProxy(key) && !IS_GLOBAL(key)) {
     var hash = GET_PRIVATE(key, hashCodeSymbol);
     return hash;
   }
   return %GenericHash(key);
 }
 %SetForceInlineFlag(GetExistingHash);
 
 
 function GetHash(key) {
   var hash = GetExistingHash(key);
@@ skipping 355 matching lines @@
   "set_has", SetHas,
   "set_delete", SetDelete,
 ]);
 
 utils.Export(function(to) {
   to.GetExistingHash = GetExistingHash;
   to.GetHash = GetHash;
 });
 
 })