Move creation of collection prototypes into JavaScript.

src/collection.js

 // Copyright 2012 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 99 matching lines @@
   %SetInitialize(this);
 }
 
 
 // -------------------------------------------------------------------
 
 function SetUpSet() {
   %CheckIsBootstrapping();
 
   %SetCode($Set, SetConstructor);
+  %FunctionSetPrototype($Set, new $Object());
   %SetProperty($Set.prototype, "constructor", $Set, DONT_ENUM);
 
   // Set up the non-enumerable functions on the Set prototype object.
   InstallGetter($Set.prototype, "size", SetGetSize);
   InstallFunctions($Set.prototype, DONT_ENUM, $Array(
     "add", SetAdd,
     "has", SetHas,
     "delete", SetDelete,
     "clear", SetClear
   ));
@@ skipping 80 matching lines @@
   %MapInitialize(this);
 }
 
 
 // -------------------------------------------------------------------
 
 function SetUpMap() {
   %CheckIsBootstrapping();
 
   %SetCode($Map, MapConstructor);
+  %FunctionSetPrototype($Map, new $Object());
   %SetProperty($Map.prototype, "constructor", $Map, DONT_ENUM);
 
   // Set up the non-enumerable functions on the Map prototype object.
   InstallGetter($Map.prototype, "size", MapGetSize);
   InstallFunctions($Map.prototype, DONT_ENUM, $Array(
     "get", MapGet,
     "set", MapSet,
     "has", MapHas,
     "delete", MapDelete,
     "clear", MapClear
@@ skipping 62 matching lines @@
   return %WeakMapDelete(this, key);
 }
 
 
 // -------------------------------------------------------------------
 
 function SetUpWeakMap() {
   %CheckIsBootstrapping();
 
   %SetCode($WeakMap, WeakMapConstructor);
+  %FunctionSetPrototype($WeakMap, new $Object());
   %SetProperty($WeakMap.prototype, "constructor", $WeakMap, DONT_ENUM);
 
   // Set up the non-enumerable functions on the WeakMap prototype object.
   InstallFunctions($WeakMap.prototype, DONT_ENUM, $Array(
     "get", WeakMapGet,
     "set", WeakMapSet,
     "has", WeakMapHas,
     "delete", WeakMapDelete
   ));
 }
 
 SetUpWeakMap();