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

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 2565328abef594157cc4ee6d5a8420cca5775676..9e39fd6eae5fbf789819e5e8ebb35697224593d6 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -19,11 +19,12 @@
 namespace v8 {
 namespace internal {
 
-MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
+MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size,
+                               CodeObjectRequired create_code_object)
     : Assembler(arg_isolate, buffer, size),
       generating_stub_(false),
       has_frame_(false) {
-  if (isolate() != NULL) {
+  if (create_code_object == CodeObjectRequired::kYes) {
     code_object_ =
         Handle<Object>::New(isolate()->heap()->undefined_value(), isolate());
   }
@@ -3645,12 +3646,11 @@ bool AreAliased(Register reg1,
 #endif
 
 
-CodePatcher::CodePatcher(byte* address,
-                         int instructions,
+CodePatcher::CodePatcher(byte* address, int instructions,
                          FlushICache flush_cache)
     : address_(address),
       size_(instructions * Assembler::kInstrSize),
-      masm_(NULL, address, size_ + Assembler::kGap),
+      masm_(NULL, address, size_ + Assembler::kGap, CodeObjectRequired::kNo),
       flush_cache_(flush_cache) {
   // Create a new macro assembler pointing to the address of the code to patch.
   // The size is adjusted with kGap on order for the assembler to generate size