Use Chrome compatible naming for compiler specifics.

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index e683bf21c735f0f82923099c634e6da499ad9b26..f1f6a91c4994be547a577b392fa8e80c403aeacb 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -791,12 +791,12 @@ 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 V8_FINAL : public RegExpVisitor {
+class RegExpUnparser FINAL : public RegExpVisitor {
  public:
   RegExpUnparser(OStream& os, Zone* zone) : os_(os), zone_(zone) {}
   void VisitCharacterRange(CharacterRange that);
 #define MAKE_CASE(Name) virtual void* Visit##Name(RegExp##Name*,          \
-                                                  void* data) V8_OVERRIDE;
+                                                  void* data) OVERRIDE;
   FOR_EACH_REG_EXP_TREE_TYPE(MAKE_CASE)
 #undef MAKE_CASE
  private: