Added %_HeapObjectGetMap and %_MapGetInstanceType intrinsics.

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 0818b7758b1e13ddc2a76400431836867a5db674..c387b370fa4dda08d370dd1bd035b4e8a97b173f 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -1506,6 +1506,22 @@ RUNTIME_FUNCTION(Runtime_JSValueGetValue) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_HeapObjectGetMap) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_CHECKED(HeapObject, obj, 0);
+  return obj->map();
+}
+
+
+RUNTIME_FUNCTION(Runtime_MapGetInstanceType) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_CHECKED(Map, map, 0);
+  return Smi::FromInt(map->instance_type());
+}
+
+
 RUNTIME_FUNCTION(Runtime_ObjectEquals) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);