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..daa05fd31861b017d58c0d51765963c8558aefcc 100644
--- a/src/arm64/codegen-arm64.cc
+++ b/src/arm64/codegen-arm64.cc
@@ -38,7 +38,7 @@ 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), false);
   masm.SetStackPointer(csp);
 
   // The argument will be in d0 on entry.