I did a search and can't seem to find this myself. it appeared to be present in some 2014 versions of chrome, but there is nothing on how to enable it to force it to use the Windows system installed version of PPAPI.
I found a cmd line switch here:
Change the shortcut target of chrome to: "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --ppapi-flash-path="C:\Windows\SysWOW64\Macromed\Flash\pepflashplayer32_19_0_0_245.dll"
it could show up as: C:\Users\%username%\AppData\Local\Google\Chrome\User Data\PepperFlash
You need to delete that and you will see the correct path
What will that do?
And I might not need to actually do this, I was just told it was a way to fix the lag when playing tetris battle on facebook. Would you know of another way to do that?