Steps towards unification of number bitset and range types.

src/types-inl.h

Index: src/types-inl.h
diff --git a/src/types-inl.h b/src/types-inl.h
index 2e7f8a36fa76325acc2dd57a9b5f84ab8ca28050..fb1e9e6ed128616398c43cc556bdce68231d7c91 100644
--- a/src/types-inl.h
+++ b/src/types-inl.h
@@ -201,6 +201,9 @@ void ZoneTypeConfig::struct_set_value(
 }
 
 
+// static
+i::Isolate* ZoneTypeConfig::get_isolate(Zone* zone) { return zone->isolate(); }
+
 // -----------------------------------------------------------------------------
 // HeapTypeConfig
 
@@ -348,6 +351,8 @@ void HeapTypeConfig::struct_set_value(
   structure->set(i + 1, *x);
 }
 
+// static
+i::Isolate* HeapTypeConfig::get_isolate(Isolate* isolate) { return isolate; }
 } }  // namespace v8::internal
 
 #endif  // V8_TYPES_INL_H_