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

test/mjsunit/harmony/regress/regress-405844.js

Index: test/mjsunit/harmony/regress/regress-405844.js
diff --git a/test/mjsunit/harmony/regress/regress-405844.js b/test/mjsunit/harmony/regress/regress-405844.js
index 3d3561f7a55fdd6681ff503652711899a4a52862..25c8295cb2a388d2749cdb6a8aba524f5ed0ea6f 100644
--- a/test/mjsunit/harmony/regress/regress-405844.js
+++ b/test/mjsunit/harmony/regress/regress-405844.js
@@ -4,10 +4,13 @@
 //
 // Flags: --harmony-proxies --harmony-object-observe
 
-var proxy = Proxy.create({ fix: function() { return {}; } });
-Object.preventExtensions(proxy);
-Object.observe(proxy, function(){});
+// TODO(neis): These tests are temporarily commented out because of ongoing
+// changes to the implementation of proxies.
 
-var functionProxy = Proxy.createFunction({ fix: function() { return {}; } }, function(){});
-Object.preventExtensions(functionProxy);
-Object.observe(functionProxy, function(){});
+//var proxy = Proxy.create({ fix: function() { return {}; } });
+//Object.preventExtensions(proxy);
+//Object.observe(proxy, function(){});
+//
+//var functionProxy = Proxy.createFunction({ fix: function() { return {}; } }, function(){});
+//Object.preventExtensions(functionProxy);
+//Object.observe(functionProxy, function(){});