Use 'override/final' instead of 'virtual' for overridden methods

Summary:
The patch is generated using clang-tidy misc-use-override check.

This command was used:

  tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py \
    -checks='-*,misc-use-override' -header-filter='llvm|clang' -j=32 -fix

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D8926

llvm-svn: 234678
diff --git a/clang/unittests/Frontend/FrontendActionTest.cpp b/clang/unittests/Frontend/FrontendActionTest.cpp
index 5581c44..90afd77 100644
--- a/clang/unittests/Frontend/FrontendActionTest.cpp
+++ b/clang/unittests/Frontend/FrontendActionTest.cpp
@@ -35,15 +35,16 @@
   bool ActOnEndOfTranslationUnit;
   std::vector<std::string> decl_names;
 
-  virtual bool BeginSourceFileAction(CompilerInstance &ci, StringRef filename) {
+  bool BeginSourceFileAction(CompilerInstance &ci,
+                             StringRef filename) override {
     if (EnableIncrementalProcessing)
       ci.getPreprocessor().enableIncrementalProcessing();
 
     return ASTFrontendAction::BeginSourceFileAction(ci, filename);
   }
 
-  virtual std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
-                                                         StringRef InFile) {
+  std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
+                                                 StringRef InFile) override {
     return llvm::make_unique<Visitor>(CI, ActOnEndOfTranslationUnit,
                                       decl_names);
   }
@@ -56,7 +57,7 @@
       CI(CI), ActOnEndOfTranslationUnit(ActOnEndOfTranslationUnit),
       decl_names_(decl_names) {}
 
-    virtual void HandleTranslationUnit(ASTContext &context) {
+    void HandleTranslationUnit(ASTContext &context) override {
       if (ActOnEndOfTranslationUnit) {
         CI.getSema().ActOnEndOfTranslationUnit();
       }