Hack forEach to use HasFastPackedElements

src/objects-inl.h

 // 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 5471 matching lines @@
 bool JSObject::HasFastHoleyElements() {
   return IsFastHoleyElementsKind(GetElementsKind());
 }
 
 
 bool JSObject::HasFastElements() {
   return IsFastElementsKind(GetElementsKind());
 }
 
 
+bool JSObject::HasFastPackedElements() {
+  return IsFastPackedElementsKind(GetElementsKind());
+}
+
+
 bool JSObject::HasDictionaryElements() {
   return GetElementsKind() == DICTIONARY_ELEMENTS;
 }
 
 
 bool JSObject::HasNonStrictArgumentsElements() {
   return GetElementsKind() == NON_STRICT_ARGUMENTS_ELEMENTS;
 }
 
 
@@ skipping 742 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_