If I walk into walmart and suddenly drop with a heart attack or whatever, I wouldn't expect the 80 year old walmart greeter to go beyond their job description and administer CPR. Would I still do business with Walmart (or whomever), yes.
Not CPR, sure but I would expect that he would alert someone who would call 911.
May be there is an other employee who has CPR training.
One thing that I forgot to mention about French law is that employers are required by law to educate their employees for security and health.
Depending on the company field and size, there are trainings for fires, CPRs, accidents, evacuation exercise.
Makes the workplace safer and it makes that a good portion of people in the streets know first aid.
A long time ago, I was working in Dallas for Arco and the first thing they made me do was taking the safety training, explaining what to do in case of fires, chemical spills, tornadoes, what number to call in case of a problem, ...
And it was good to me even if I was a short term contractor working there
There's always a hope they'd call 911 but not a requirement. Lawyers have screwed the US system so much that your damned if you do, damned if you don't.
And, really, this is the saddest part of it.