CallInterfaceDescriptor should use MachineType

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index b58f7f870960f43ea804a2a3f376a32644ecfadf..6ddc31ce2b0255a53fb21a2e3a35935e85576681 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1936,7 +1936,6 @@ Isolate::Isolate(bool enable_serializer)
                      ? new VerboseAccountingAllocator(&heap_, 256 * KB)
                      : new base::AccountingAllocator()),
       runtime_zone_(new Zone(allocator_)),
-      interface_descriptor_zone_(new Zone(allocator_)),
       inner_pointer_to_code_cache_(NULL),
       global_handles_(NULL),
       eternal_handles_(NULL),
@@ -2215,9 +2214,6 @@ Isolate::~Isolate() {
   delete runtime_zone_;
   runtime_zone_ = nullptr;
 
-  delete interface_descriptor_zone_;
-  interface_descriptor_zone_ = nullptr;
-
   delete allocator_;
   allocator_ = nullptr;