Hack forEach to use HasFastPackedElements

src/runtime.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 432 matching lines @@
   \
   /* Pseudo functions - handled as macros by parser */ \
   F(IS_VAR, 1, 1) \
   \
   /* expose boolean functions from objects-inl.h */ \
   F(HasFastSmiElements, 1, 1) \
   F(HasFastSmiOrObjectElements, 1, 1) \
   F(HasFastObjectElements, 1, 1) \
   F(HasFastDoubleElements, 1, 1) \
   F(HasFastHoleyElements, 1, 1) \
+  F(HasFastPackedElements, 1, 1) \
   F(HasDictionaryElements, 1, 1) \
   F(HasNonStrictArgumentsElements, 1, 1) \
   F(HasExternalPixelElements, 1, 1) \
   F(HasExternalArrayElements, 1, 1) \
   F(HasExternalByteElements, 1, 1) \
   F(HasExternalUnsignedByteElements, 1, 1) \
   F(HasExternalShortElements, 1, 1) \
   F(HasExternalUnsignedShortElements, 1, 1) \
   F(HasExternalIntElements, 1, 1) \
   F(HasExternalUnsignedIntElements, 1, 1) \
@@ skipping 369 matching lines @@
 //---------------------------------------------------------------------------
 // Constants used by interface to runtime functions.
 
 class DeclareGlobalsEvalFlag:     public BitField<bool,         0, 1> {};
 class DeclareGlobalsNativeFlag:   public BitField<bool,         1, 1> {};
 class DeclareGlobalsLanguageMode: public BitField<LanguageMode, 2, 2> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_