extend-uploader.js

// When image uploads complete, trigger a check for additional mime types
//Extend the Uploader success.
jQuery.extend(wp.Uploader.prototype, {
	success: function( file ) {
		wp.ajax.post(
			'media-create-image-mime-types',
			{
				_wpnonce: _wpPluploadSettings.defaults.multipart_params._wpnonce,
				attachment_id: file.id,
			}
		);
	}
	// Call original success?
} );