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

src/x87/macro-assembler-x87.h

Index: src/x87/macro-assembler-x87.h
diff --git a/src/x87/macro-assembler-x87.h b/src/x87/macro-assembler-x87.h
index 819b8f3851a7e9676e6166abf03b59e1bb2e0fbc..c904b388d6ff114213b182434827f8f1b0569fee 100644
--- a/src/x87/macro-assembler-x87.h
+++ b/src/x87/macro-assembler-x87.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,
+                 bool create_code_object);
 
   void Load(Register dst, const Operand& src, Representation r);
   void Store(Register src, const Operand& dst, Representation r);