Native construction of RegExp result objects, with in-object index and input.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 44c90b6428f3f14a9344056d6dea012ecc860dc1..ce112f3e800a50bdfaf43921cace6b656614a5a8 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -76,6 +76,7 @@ enum ContextLookupFlags {
   V(FUNCTION_MAP_INDEX, Map, function_map) \
   V(FUNCTION_INSTANCE_MAP_INDEX, Map, function_instance_map) \
   V(JS_ARRAY_MAP_INDEX, Map, js_array_map)\
+  V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map)\
   V(ARGUMENTS_BOILERPLATE_INDEX, JSObject, arguments_boilerplate) \
   V(MESSAGE_LISTENERS_INDEX, JSObject, message_listeners) \
   V(MAKE_MESSAGE_FUN_INDEX, JSFunction, make_message_fun) \
@@ -175,6 +176,7 @@ class Context: public FixedArray {
     SECURITY_TOKEN_INDEX,
     ARGUMENTS_BOILERPLATE_INDEX,
     JS_ARRAY_MAP_INDEX,
+    REGEXP_RESULT_MAP_INDEX,
     FUNCTION_MAP_INDEX,
     FUNCTION_INSTANCE_MAP_INDEX,
     INITIAL_OBJECT_PROTOTYPE_INDEX,