Move the contents of api-natives.js to c++

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index cd3ff1421177fa9e41b691c5b0030ae91b195dfc..bf4812ef8843b076522de3e1511c927104bf69e0 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -100,8 +100,6 @@ enum BindingFlags {
   V(TO_INT32_FUN_INDEX, JSFunction, to_int32_fun)                              \
   V(TO_LENGTH_FUN_INDEX, JSFunction, to_length_fun)                            \
   V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun)                        \
-  V(INSTANTIATE_FUN_INDEX, JSFunction, instantiate_fun)                        \
-  V(CONFIGURE_INSTANCE_FUN_INDEX, JSFunction, configure_instance_fun)          \
   V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun)                      \
   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
   V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun)                          \
@@ -140,7 +138,7 @@ enum BindingFlags {
   V(MAKE_MESSAGE_FUN_INDEX, JSFunction, make_message_fun)                      \
   V(GET_STACK_TRACE_LINE_INDEX, JSFunction, get_stack_trace_line_fun)          \
   V(CONFIGURE_GLOBAL_INDEX, JSFunction, configure_global_fun)                  \
-  V(FUNCTION_CACHE_INDEX, JSObject, function_cache)                            \
+  V(FUNCTION_CACHE_INDEX, FixedArray, function_cache)                          \
   V(JSFUNCTION_RESULT_CACHES_INDEX, FixedArray, jsfunction_result_caches)      \
   V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache)                  \
   V(RUNTIME_CONTEXT_INDEX, Context, runtime_context)                           \
@@ -348,8 +346,6 @@ class Context: public FixedArray {
     TO_INT32_FUN_INDEX,
     TO_BOOLEAN_FUN_INDEX,
     GLOBAL_EVAL_FUN_INDEX,
-    INSTANTIATE_FUN_INDEX,
-    CONFIGURE_INSTANCE_FUN_INDEX,
     ARRAY_BUFFER_FUN_INDEX,
     UINT8_ARRAY_FUN_INDEX,
     INT8_ARRAY_FUN_INDEX,