Merge pull request #21783 from xedin/rdar-30933988

[AST] `Decl::is*AccessibleFrom` methods should respect access control…

lib/Sema/ConstraintSystem.cpp

@@ -715,8 +715,7 @@ static bool doesStorageProduceLValue(TypeChecker &TC,
   if (!storage->isSettable(useDC, base))
     return false;
   
-  if (TC.Context.LangOpts.EnableAccessControl &&
-      !storage->isSetterAccessibleFrom(useDC))
+  if (!storage->isSetterAccessibleFrom(useDC))
     return false;
 
   // If there is no base, or if the base isn't being used, it is settable.