flagprocessors: move _flagserrorclass attribute on revlog & co
This is a small duplication, and the last bit we need to get rid of the mixin.
Honestly, I am not fan of that class attribute and it mostly exist to accomodate
The simple-storage whose usage of flag processors is dumbious and that is
currently dead code anyway. However I don't want to be pulled into futher
unrelated cleaning so it is a small price to pay.
Differential Revision: https://phab.mercurial-scm.org/D6822
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}