Rollback of r12868, r12849 in trunk branch.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 9113e7bd4058619526361c01b4482174b463b413..1f7cf100e9480282309fc08c9ad152471d2fd1ab 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -2527,14 +2527,6 @@ bool Heap::CreateInitialMaps() {
   }
   set_message_object_map(Map::cast(obj));
 
-  Map* external_map;
-  { MaybeObject* maybe_obj =
-        AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize + kPointerSize);
-    if (!maybe_obj->To(&external_map)) return false;
-  }
-  external_map->set_is_extensible(false);
-  set_external_map(external_map);
-
   ASSERT(!InNewSpace(empty_fixed_array()));
   return true;
 }
@@ -5137,20 +5129,6 @@ MaybeObject* Heap::AllocateScopeInfo(int length) {
 }
 
 
-MaybeObject* Heap::AllocateExternal(void* value) {
-  Foreign* foreign;
-  { MaybeObject* maybe_result = AllocateForeign(static_cast<Address>(value));
-    if (!maybe_result->To(&foreign)) return maybe_result;
-  }
-  JSObject* external;
-  { MaybeObject* maybe_result = AllocateJSObjectFromMap(external_map());
-    if (!maybe_result->To(&external)) return maybe_result;
-  }
-  external->SetInternalField(0, foreign);
-  return external;
-}
-
-
 MaybeObject* Heap::AllocateStruct(InstanceType type) {
   Map* map;
   switch (type) {