civicrm/civicrm-core — pull request #3067 by sgladstone (2014-05-01 01:12:50+00:00)
Title: Use TCPDF from within Create PDF Letter action

TCPDF is already used to create PDF files for Mailing Labels and Name Badges. This was added to the action "Create PDF Letter" as well. If CiviCRM is configured to use wkhtmltopdf, then TCPDF is not used for Create PDF Letter.