WordPress at a glance
filter is not described

post_row_actions filter-hook . WP 2.8.0

Filters the array of row action links on the Posts list table.

The filter is evaluated only for non-hierarchical post types.

Usage

add_filter( 'post_row_actions', 'filter_function_name_4000', 10, 2 );
function filter_function_name_4000( $actions, $post ){
	// filter...

	return $actions;
}
$actions(array)
An array of row action links.
Default: are 'Edit', 'Quick Edit', 'Restore', 'Trash', 'Delete Permanently', 'Preview', and 'View'
$post(WP_Post)
The post object.

Where the hook is called

WP_Posts_List_Table::handle_row_actions()
post_row_actions
wp-admin/includes/class-wp-posts-list-table.php 1342
$actions = apply_filters( 'post_row_actions', $actions, $post );

Where the hook is used (in WP core)

Does not used.