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

test/mjsunit/harmony/proxies-hash.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 52 matching lines @@
   assertTrue(s.has(p1));
   assertTrue(s.has(p2));
   assertFalse(s.has(p3));
 
   s.delete(p2);
   assertTrue(s.has(p1));
   assertFalse(s.has(p2));
   assertFalse(s.has(p3));
 }
 
-TestSet(Set, Object.seal)
-TestSet(Set, Object.freeze)
-TestSet(Set, Object.preventExtensions)
+// TODO(neis): Reenable once proxies properly support these operations.
+// TestSet(Set, Object.seal)
+// TestSet(Set, Object.freeze)
+// TestSet(Set, Object.preventExtensions)
 
 
 // Maps and weak maps.
 
 function TestMap(construct, fix) {
   TestWithProxies(TestMap2, construct, fix)
 }
 
 function TestMap2(construct, fix, create) {
   var handler = {fix: function() { return {} }}
@@ skipping 20 matching lines @@
   assertSame(321, m.get(p2));
 
   m.delete(p2);
   assertTrue(m.has(p1));
   assertFalse(m.has(p2));
   assertFalse(m.has(p3));
   assertSame(123, m.get(p1));
   assertSame(undefined, m.get(p2));
 }
 
-TestMap(Map, Object.seal)
-TestMap(Map, Object.freeze)
-TestMap(Map, Object.preventExtensions)
+// TODO(neis): Reenable once proxies properly support these operations.
+// TestMap(Map, Object.seal)
+// TestMap(Map, Object.freeze)
+// TestMap(Map, Object.preventExtensions)
 
-TestMap(WeakMap, Object.seal)
-TestMap(WeakMap, Object.freeze)
-TestMap(WeakMap, Object.preventExtensions)
+// TODO(neis): Reenable once proxies properly support these operations.
+// TestMap(WeakMap, Object.seal)
+// TestMap(WeakMap, Object.freeze)
+// TestMap(WeakMap, Object.preventExtensions)