WordPress at a glance
filter is not described

user_row_actions filter-hook . WP 2.8.0

Filters the action links displayed under each user in the Users list table.

Usage

add_filter( 'user_row_actions', 'filter_function_name_2605', 10, 2 );
function filter_function_name_2605( $actions, $user_object ){
	// filter...

	return $actions;
}
$actions(array)
An array of action links to be displayed.
Default: 'Edit', 'Delete' for single site, and 'Edit', 'Remove' for Multisite
$user_object(WP_User)
WP_User object for the currently-listed user.

Where the hook is called

WP_Users_List_Table::single_row()
user_row_actions
wp-admin/includes/class-wp-users-list-table.php 442
$actions = apply_filters( 'user_row_actions', $actions, $user_object );

Where the hook is used (in WP core)

Does not used.