Use big-boy Types to annotate interface descriptor parameters

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index fb20f9f35361625b6975354e8772c33309d2a2d5..ffef934a0179700c2f1ac5e00ab9fe2200daf758 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -886,6 +886,7 @@ class Isolate {
     return handle_scope_implementer_;
   }
   Zone* runtime_zone() { return &runtime_zone_; }
+  Zone* interface_descriptor_zone() { return &interface_descriptor_zone_; }
 
   UnicodeCache* unicode_cache() {
     return unicode_cache_;
@@ -1271,6 +1272,7 @@ class Isolate {
   HandleScopeImplementer* handle_scope_implementer_;
   UnicodeCache* unicode_cache_;
   Zone runtime_zone_;
+  Zone interface_descriptor_zone_;
   InnerPointerToCodeCache* inner_pointer_to_code_cache_;
   GlobalHandles* global_handles_;
   EternalHandles* eternal_handles_;