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

src/arm64/codegen-arm64.cc

Index: src/arm64/codegen-arm64.cc
diff --git a/src/arm64/codegen-arm64.cc b/src/arm64/codegen-arm64.cc
index 6a71f67e217cc63c66178caf400992e906a5bef7..59ce8f2f8873bc13df61bd98a968455ba49ee9ad 100644
--- a/src/arm64/codegen-arm64.cc
+++ b/src/arm64/codegen-arm64.cc
@@ -38,7 +38,8 @@ UnaryMathFunctionWithIsolate CreateExpFunction(Isolate* isolate) {
   if (buffer == nullptr) return nullptr;
 
   ExternalReference::InitializeMathExpData();
-  MacroAssembler masm(nullptr, buffer, static_cast<int>(actual_size));
+  MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size),
+                      CodeObjectRequired::kNo);
   masm.SetStackPointer(csp);
 
   // The argument will be in d0 on entry.