There are times Administrators would like to disable the "Save as PDF" functionality within Google Chrome through either command-line switches, Windows Registry/Group Policy in order to ensure users can not save sensitive printable content to any locations.
When you review the Resources.pak file you can see that the pdfPrinterEnabled setting exists but is sadly only controlled by the init() where the value is equal to !isInAppKioskMode.
This setting should be configurable through the Windows Registry and Group Policy (.ADMX) to override the default init() behavior.
(HKLM || HKCU)\Software\Policies\Google\Chrome\
A REG_DWORD similar to the "DeveloperToolsDisabled" could be defined to flag whether or not the pdfPrinterEnabled is set to false or true.