Turn revisions off in plugin instead of config.php?

Is there a function to set WP_POST_REVISIONS from a plugin instead of having to do it in config.php? I was thinking of doing this:

runkit_constant_redefine( 'WP_POST_REVISIONS', 0 );

but that puts a dependency on runkit being compiled in with PHP which I’m not sure is usual/typical.

I want to turn revisions off completely and I’d like my (narrow use, special purpose) plugin to be as “turnkey” as possible; not requiring other tweaks or manual adjustments.

1. Create a no-revs.php
2. Set the contents to <?php defined('WP_POST_REVISIONS') or define ('WP_POST_REVISIONS', false);
3. Place it in the Must Use Plugins Folder located at wp-content/mu-plugins.

Be warned; It is recommended that you to have at least 3 post revisions to avoid any loss of data.