Hi,unfortunately only foo2hbpl supports Workcentre 6015. I have tried the others without success. I ask Smedley (Paul) some time ago but I think He didn't had time until now.
Google Cloud Print Klipp, I have used with FF ESR 24.8.1 in eCS. As I have my printer registered a week ago in GCP (I thing I did with an Ubuntu box with Chrome or Chromium, where I have the printer installed as a wifi network printer) I have only to access
https://www.google.com/cloudprint?user=0#printers logged im my Google account and click in PRINT to select the file to print. It only accepts pdf, ps, jpeg, png and gif, so I have used to convert my jobs tp pdf with Open office. No problems until now. In Ubuntu I can use the option to covert directly to pdf to Google Drive but not works in eCS.
The description of my printer in GCP is:
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Registrada no Cloud Print
11 de jun de 2015 16:02:54
Última atualização
17 de jun de 2015 17:45:24
ID da impressora
aa2eebd9-b27d-aacf-4dec-6dd952ad18d0
Versão do Google Cloud Print
1.0
Tipos de conteúdo suportados
application/pdf, application/postscript, image/jpeg, image/png, image/gif
Proxy
0C5D89D3-7B0E-4DE1-9231-48B0535A0871
Tags
^recent
^own
^connector
^can_share
^can_update
^can_delete
__cp__chrome_version
43.0.2357.125 unknown
__cp__copies
1
__cp__device-uri
dnssd://Xerox%20WorkCentre%206015NI%20(0D%3A15%3A37)._pdl-datastream._tcp.local/
__cp__finishings
3
__cp__job-hold-until
no-hold
__cp__job-priority
50
__cp__job-sheets
none,none
__cp__marker-change-time
1434056340
__cp__marker-colors
#00FFFF,#FF00FF,#FFFF00,#000000
__cp__marker-levels
50,65,67,9
__cp__marker-names
Cyan\ Cartridge,Magenta\ Cartridge,Yellow\ Cartridge,Black\ Cartridge
__cp__marker-types
toner,toner,toner,toner
__cp__number-up
1
__cp__ppd-timestamp
*
__cp__printer-commands
AutoConfigure,Clean,PrintSelfTestPage
__cp__printer-info
Xerox WorkCentre 6015NI
__cp__printer-is-accepting-jobs
true
__cp__printer-is-colormanaged
true
__cp__printer-make-and-model
Xerox WorkCentre 6015 Foomatic/foo2hbpl2 (recommended)
__cp__printer-state
3
__cp__printer-state-change-time
1434477020
__cp__printer-state-reasons
none
__cp__printer-type
8556556
__cp__printer-uri-supported
ipp://localhost:631/printers/WorkCentre-6015NI
__cp__system_driverinfo
X
__cp__system_name
Linux
__cp__system_version
3.13.0-55-generic
__cp__tagshash
178560ad791eced6777b7cd9936882c9
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Rfsenger