[Sanitizer] Add "final" specifier to FlagHandlerBase::Parse overrides. NFC.

llvm-svn: 228893

compiler-rt/lib/msan/msan.cc

@@ -111,7 +111,7 @@ class FlagHandlerKeepGoing : public FlagHandlerBase {
  public:
   explicit FlagHandlerKeepGoing(bool *halt_on_error)
       : halt_on_error_(halt_on_error) {}
-  bool Parse(const char *value) {
+  bool Parse(const char *value) final {
     bool tmp;
     FlagHandler<bool> h(&tmp);
     if (!h.Parse(value)) return false;

compiler-rt/lib/sanitizer_common/sanitizer_flag_parser.h

@@ -31,7 +31,7 @@ class FlagHandler : public FlagHandlerBase {
 
  public:
   explicit FlagHandler(T *t) : t_(t) {}
-  bool Parse(const char *value);
+  bool Parse(const char *value) final;
 };
 
 template <>

compiler-rt/lib/sanitizer_common/sanitizer_flags.cc

@@ -51,7 +51,7 @@ class FlagHandlerInclude : public FlagHandlerBase {
 
  public:
   explicit FlagHandlerInclude(FlagParser *parser) : parser_(parser) {}
-  bool Parse(const char *value) {
+  bool Parse(const char *value) final {
     char *data;
     uptr data_mapped_size;
     int err;