[proxies] Remove "fix" functionality, add (still unused) target property.

test/mjsunit/strong/load-proxy.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.
 
 // Flags: --harmony-proxies --strong-mode
 
 // Forwarding proxies adapted from proposal definition
 function handlerMaker1(obj) {
   return {
     getPropertyDescriptor: function(name) {
@@ skipping 62 matching lines @@
   assertThrows(function(){baseObj[1]}, TypeError);
   assertThrows(function(){childObjAccessor1.foo}, TypeError);
   assertThrows(function(){childObjAccessor1[1]}, TypeError);
   assertThrows(function(){childObjAccessor2.foo}, TypeError);
   assertThrows(function(){childObjAccessor2[1]}, TypeError);
 
   // Once the proxy is no longer trapping, property access should have strong
   // semantics.
   Object.freeze(baseObj);
 
-  Object.freeze(proxy1);
-  assertThrows(function(){proxy1.foo}, TypeError);
-  assertThrows(function(){proxy1[1]}, TypeError);
-  assertThrows(function(){childObj1.foo}, TypeError);
-  assertThrows(function(){childObj1[1]}, TypeError);
-  assertThrows(function(){childObjAccessor1.foo}, TypeError);
-  assertThrows(function(){childObjAccessor1[1]}, TypeError);
-
-  Object.freeze(proxy2);
-  assertThrows(function(){proxy2.foo}, TypeError);
-  assertThrows(function(){proxy2[1]}, TypeError);
-  assertThrows(function(){childObj2.foo}, TypeError);
-  assertThrows(function(){childObj2[1]}, TypeError);
-  assertThrows(function(){childObjAccessor2.foo}, TypeError);
-  assertThrows(function(){childObjAccessor2[1]}, TypeError);
+  // TODO(neis): Reenable once proxies properly support freeze.
+  //
+  // Object.freeze(proxy1);
+  // assertThrows(function(){proxy1.foo}, TypeError);
+  // assertThrows(function(){proxy1[1]}, TypeError);
+  // assertThrows(function(){childObj1.foo}, TypeError);
+  // assertThrows(function(){childObj1[1]}, TypeError);
+  // assertThrows(function(){childObjAccessor1.foo}, TypeError);
+  // assertThrows(function(){childObjAccessor1[1]}, TypeError);
+  //
+  // Object.freeze(proxy2);
+  // assertThrows(function(){proxy2.foo}, TypeError);
+  // assertThrows(function(){proxy2[1]}, TypeError);
+  // assertThrows(function(){childObj2.foo}, TypeError);
+  // assertThrows(function(){childObj2[1]}, TypeError);
+  // assertThrows(function(){childObjAccessor2.foo}, TypeError);
+  // assertThrows(function(){childObjAccessor2[1]}, TypeError);
 })();