Reland "[strong] Object literals create strong objects"

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index f120788609f2d748ed0015684cc0f91f0900d899..d06e4e81855814a571d905d429897defebd162f1 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -85,6 +85,7 @@ enum BindingFlags {
   V(INTERNAL_ARRAY_FUNCTION_INDEX, JSFunction, internal_array_function)        \
   V(ARRAY_FUNCTION_INDEX, JSFunction, array_function)                          \
   V(JS_ARRAY_MAPS_INDEX, Object, js_array_maps)                                \
+  V(JS_ARRAY_STRONG_MAPS_INDEX, Object, js_array_strong_maps)                  \
   V(DATE_FUNCTION_INDEX, JSFunction, date_function)                            \
   V(JSON_OBJECT_INDEX, JSObject, json_object)                                  \
   V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function)                        \
@@ -341,6 +342,7 @@ class Context: public FixedArray {
     INTERNAL_ARRAY_FUNCTION_INDEX,
     ARRAY_FUNCTION_INDEX,
     JS_ARRAY_MAPS_INDEX,
+    JS_ARRAY_STRONG_MAPS_INDEX,
     DATE_FUNCTION_INDEX,
     JSON_OBJECT_INDEX,
     REGEXP_FUNCTION_INDEX,