Make whether or not a Code object should be created by masm explicit

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 c325eeee10857042ba73183dd621c9ff0a4cd43f..d5618517e140d487c9a8b2cc9d75e758ad7996e5 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -63,11 +63,8 @@ bool AreAliased(Register reg1,
 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
-  // The isolate parameter can be NULL if the macro assembler should
-  // not use isolate-dependent functionality. In this case, it's the
-  // responsibility of the caller to never invoke such function on the
-  // macro assembler.
-  MacroAssembler(Isolate* isolate, void* buffer, int size);
+  MacroAssembler(Isolate* isolate, void* buffer, int size,
+                 CodeObjectRequired create_code_object);
 
   void Load(Register dst, const Operand& src, Representation r);
   void Store(Register src, const Operand& dst, Representation r);