Renaming the chains() ranged iterator to chain() per suggestion by Richard Smith.

llvm-svn: 203262
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index f57c7fc..2ff2d86 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -3487,7 +3487,7 @@
         //   anonymous union is declared.
         unsigned OldChainingSize = Chaining.size();
         if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD))
-          for (auto *PI : IF->chains())
+          for (auto *PI : IF->chain())
             Chaining.push_back(PI);
         else
           Chaining.push_back(VD);