[Gutenberg] 1008: Extend core blocks to add AMP-specific functionality.

amp.php

@@ -143,6 +143,7 @@ function amp_init() {
 	AMP_Post_Type_Support::add_post_type_support();
 	add_filter( 'request', 'amp_force_query_var_value' );
 	add_action( 'admin_init', 'AMP_Options_Manager::register_settings' );
+	add_action( 'wp_loaded', 'amp_editor_core_blocks' );
 	add_action( 'wp_loaded', 'amp_post_meta_box' );
 	add_action( 'wp_loaded', 'amp_add_options_menu' );
 	add_action( 'parse_query', 'amp_correct_query_when_is_front_page' );