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

src/x64/macro-assembler-x64.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_X64_MACRO_ASSEMBLER_X64_H_
 #define V8_X64_MACRO_ASSEMBLER_X64_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/base/flags.h"
@@ skipping 67 matching lines @@
       : reg(index_register),
         scale(scale) {}
   Register reg;
   ScaleFactor scale;
 };
 
 
 // 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);
 
   // Prevent the use of the RootArray during the lifetime of this
   // scope object.
   class NoRootArrayScope BASE_EMBEDDED {
    public:
     explicit NoRootArrayScope(MacroAssembler* assembler)
         : variable_(&assembler->root_array_available_),
           old_value_(assembler->root_array_available_) {
       assembler->root_array_available_ = false;
     }
@@ skipping 1631 matching lines @@
   }                                                                          \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_