[C++11] Add 'override' keyword to virtual methods that override their base class.

llvm-svn: 203641
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index fca6dcd..ed9d72d 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -428,7 +428,7 @@
     WantTypeSpecifiers = AllowTypes;
   }
 
-  virtual bool ValidateCandidate(const TypoCorrection &candidate) {
+  bool ValidateCandidate(const TypoCorrection &candidate) override {
     NamedDecl *ND = candidate.getCorrectionDecl();
     if (!ND)
       return candidate.isKeyword();