Write barrier for storing a code entry, and usage in CompileLazy builtin.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index a436a548e09d78c1976e3a138c0a7eebbb10f0a6..1ace4372b61135e0c3cdeac5c15e0bc46e29d0ff 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -168,6 +168,9 @@ class MacroAssembler: public Assembler {
       PointersToHereCheck pointers_to_here_check_for_value =
           kPointersToHereMaybeInteresting);
 
+  void RecordWriteCodeEntryField(Register js_function, Register code_entry,
+                                 Register scratch);
+
   // As above, but the offset has the tag presubtracted.  For use with
   // Operand(reg, off).
   void RecordWriteContextSlot(