Consistently use only one of virtual/OVERRIDE/FINAL.

src/bootstrapper.h

Index: src/bootstrapper.h
diff --git a/src/bootstrapper.h b/src/bootstrapper.h
index 0cc84861b3e9711876aa9b04e4b2817609e77f8e..9d4f270842d3121a51b6081361019972db45eaf0 100644
--- a/src/bootstrapper.h
+++ b/src/bootstrapper.h
@@ -158,8 +158,8 @@ class NativesExternalStringResource FINAL
   NativesExternalStringResource(Bootstrapper* bootstrapper,
                                 const char* source,
                                 size_t length);
-  virtual const char* data() const OVERRIDE { return data_; }
-  virtual size_t length() const OVERRIDE { return length_; }
+  const char* data() const OVERRIDE { return data_; }
+  size_t length() const OVERRIDE { return length_; }
 
  private:
   const char* data_;