Move private classes into anonymous namespaces.

llvm-svn: 202595
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 5229274..7bf1071 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -3777,7 +3777,7 @@
   llvm_unreachable("Unable to convert function");
 }
 
-unsigned getAbsoluteValueFunctionKind(const FunctionDecl *FDecl) {
+static unsigned getAbsoluteValueFunctionKind(const FunctionDecl *FDecl) {
   const IdentifierInfo *FnInfo = FDecl->getIdentifier();
   if (!FnInfo)
     return 0;