Simplify PrepareForDataProperty in the IsElement case

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 0eefbec2ab7fb568312a7282649ebb5b9d9bfbfa..a202320357cb8ee39e66355adf948fece8fc9e20 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -6960,43 +6960,6 @@ bool DescriptorArray::CanHoldValue(int descriptor, Object* value) {
 
 
 // static
-Handle<Map> Map::PrepareForDataElement(Handle<Map> map, Handle<Object> value) {
-  ElementsKind kind = map->elements_kind();
-  bool holey = IsHoleyElementsKind(kind);
-
-  switch (kind) {
-    case FAST_SMI_ELEMENTS:
-    case FAST_HOLEY_SMI_ELEMENTS:
-      if (value->IsSmi()) return map;
-      kind = value->IsNumber() ? FAST_DOUBLE_ELEMENTS : FAST_ELEMENTS;
-      break;
-
-    case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS:
-      if (value->IsNumber()) return map;
-      kind = FAST_ELEMENTS;
-      break;
-
-    case FAST_ELEMENTS:
-    case FAST_HOLEY_ELEMENTS:
-    case DICTIONARY_ELEMENTS:
-    case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
-    case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
-#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-  case EXTERNAL_##TYPE##_ELEMENTS:                      \
-  case TYPE##_ELEMENTS:
-
-      TYPED_ARRAYS(TYPED_ARRAY_CASE)
-#undef TYPED_ARRAY_CASE
-      return map;
-  }
-
-  if (holey) kind = GetHoleyElementsKind(kind);
-  return Map::AsElementsKind(map, kind);
-}
-
-
-// static
 Handle<Map> Map::PrepareForDataProperty(Handle<Map> map, int descriptor,
                                         Handle<Object> value) {
   // Dictionaries can store any property value.