Change the type of the cache so we can check whether it is there

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 0f8bf77b53d2fbf1ca11bdb48500c944af29215a..63c9955b9791aa95b7d32b51e240d1774a489a19 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -160,7 +160,7 @@ enum BindingFlags {
   V(CONFIGURE_GLOBAL_INDEX, JSFunction, configure_global_fun)                  \
   V(FUNCTION_CACHE_INDEX, JSObject, function_cache)                            \
   V(JSFUNCTION_RESULT_CACHES_INDEX, FixedArray, jsfunction_result_caches)      \
-  V(NORMALIZED_MAP_CACHE_INDEX, NormalizedMapCache, normalized_map_cache)      \
+  V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache)                  \
   V(RUNTIME_CONTEXT_INDEX, Context, runtime_context)                           \
   V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate)    \
   V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction,                            \