Replace OVERRIDE->override and FINAL->final since we now require C++11.

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index 7c6054edad8597e05bd21d213bb810c6c14ed9f0..5038716003e80125c1ff1fd1b3709443a0a3ea63 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -789,12 +789,12 @@ bool RegExpCapture::IsAnchoredAtEnd() {
 // in as many cases as possible, to make it more difficult for incorrect
 // parses to look as correct ones which is likely if the input and
 // output formats are alike.
-class RegExpUnparser FINAL : public RegExpVisitor {
+class RegExpUnparser final : public RegExpVisitor {
  public:
   RegExpUnparser(std::ostream& os, Zone* zone) : os_(os), zone_(zone) {}
   void VisitCharacterRange(CharacterRange that);
-#define MAKE_CASE(Name) virtual void* Visit##Name(RegExp##Name*,          \
-                                                  void* data) OVERRIDE;
+#define MAKE_CASE(Name) \
+  virtual void* Visit##Name(RegExp##Name*, void* data) override;
   FOR_EACH_REG_EXP_TREE_TYPE(MAKE_CASE)
 #undef MAKE_CASE
  private: