flagprocessors: use _processflagsread in simple cases

When there are no ambiguity regarding the `raw` value, we can simply use the new
method.

Differential Revision: https://phab.mercurial-scm.org/D6802

hgext/remotefilelog/remotefilelog.py

@@ -324,7 +324,7 b' class remotefilelog(flagutil.flagprocess'
         flags = store.getmeta(self.filename, node).get(constants.METAKEYFLAG, 0)
         if flags == 0:
             return rawtext
-        text, verifyhash = self._processflags(rawtext, flags, 'read')
+        text, verifyhash = self._processflagsread(rawtext, flags)
         return text
 
     def rawdata(self, node):