[strong] cache strong object literal maps

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index b019c6de3997ee7c7549ce757f5e4b08ee56aa2b..d86ac419ce4685a28d25ead081518103fa496749 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -82,6 +82,7 @@ enum BindingFlags {
   V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map)   \
   V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function)                        \
   V(OBJECT_FUNCTION_INDEX, JSFunction, object_function)                        \
+  V(JS_OBJECT_STRONG_MAP_INDEX, Map, js_object_strong_map)                     \
   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)                                \
@@ -153,6 +154,7 @@ enum BindingFlags {
   V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function)    \
   V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function)  \
   V(MAP_CACHE_INDEX, Object, map_cache)                                        \
+  V(STRONG_MAP_CACHE_INDEX, Object, strong_map_cache)                          \
   V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data)                            \
   V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings)    \
   V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object,                     \
@@ -340,6 +342,7 @@ class Context: public FixedArray {
     STRING_FUNCTION_PROTOTYPE_MAP_INDEX,
     SYMBOL_FUNCTION_INDEX,
     OBJECT_FUNCTION_INDEX,
+    JS_OBJECT_STRONG_MAP_INDEX,
     INTERNAL_ARRAY_FUNCTION_INDEX,
     ARRAY_FUNCTION_INDEX,
     JS_ARRAY_MAPS_INDEX,
@@ -427,6 +430,7 @@ class Context: public FixedArray {
     ARRAY_VALUES_ITERATOR_INDEX,
     SCRIPT_CONTEXT_TABLE_INDEX,
     MAP_CACHE_INDEX,
+    STRONG_MAP_CACHE_INDEX,
     TO_LENGTH_FUN_INDEX,
     NATIVES_UTILS_OBJECT_INDEX,
     EXTRAS_EXPORTS_OBJECT_INDEX,